p0740 chrysler voyager

What Does The P0740 Code Mean?

• Updated: February 12, 2023

No matter how much experience you have working with cars, the Check Engine Light always causes a moment of fear. You’ll be driving down the road just fine, and that light comes on to ruin your day. If you’ve scanned the engine and gotten the P0740 code, you want to know how to fix it.

In this guide, we explain the meaning of the P0740 DTC. We look at some common symptoms and show you what might be causing the problem. If you want to diagnose it yourself, we have some helpful steps to get you started later in the article. By the time you reach the end, you’ll gain some answers to the questions you’ve been asking. 

Code P0740 Definition

P0740 – Torque Converter Clutch Solenoid Circuit/Open Circuit Malfunction

What Does the P0740 Code Mean?

The P0740 trouble code indicates that the Powertrain Control Module (PCM) detected an abnormal reading from the torque converter clutch circuit. Usually, the PCM goes through numerous checks and the reading needs to be abnormal for a specified amount of time before the light comes on.

This code is considered generic and universal. However, some manufacturers don’t list it at all and some others change the meaning slightly to mean something different. For that reason, it’s best to look up manufacturer-specific codes based on what type of vehicle you drive. 

What Are The Symptoms Of P0740?

The most obvious symptom will be the Check Engine Light. Along with this, you may notice several transmission or engine performance problems. Here are some to look out for.

• Check Engine Light
• Erratic shifting
• Transmission shifting harshly
• Car doesn’t move because the torque converter clutch won’t engage or disengage
• Engine stalls
• Transmission overheats
• Reduced fuel economy

What Are The Causes of P0740?

Because this trouble code has to do with the torque converter clutch, it’s common to assume that is the faulty part, but there are many other possible causes. Here are a few to consider.

• Defective torque converter clutch solenoid
• Malfunctioning torque converter
• Electrical malfunction
• Improper transmission fluid level
• Internal transmission damage

How Serious is the P0740 Code?

Severe – The P0470 trouble code can be caused by serious issues. At any moment, the car can stop running and leave you stranded. 

It’s also possible to experience such severe performance problems that it can affect how you drive. If the car is shifting erratically in a lot of traffic, you could easily cause an accident.

Beyond that, driving your car with this problem will only lead to further damage. You could cause serious damage to the transmission, leading to much higher repair bills. 

How Do I Fix the P0740 Code?

The only way to fix the problem is to know what’s causing it in the first place. For that, a complete diagnosis is needed. If you can’t do it yourself, take the car to a qualified mechanic. Otherwise, we list a few helpful steps below. 

Here are some common fixes you may need to perform.

• Replace torque converter clutch solenoid
• Replace torque converter
• Repair electrical malfunction
• Add/change transmission fluid
• Replace or rebuild the transmission
• Update/replace PCM

Common P0740 Diagnosis Mistakes

It’s easy to make mistakes while diagnosing the P0740 trouble code. Many mechanics want to assume that the torque converter is damaged simply because that’s the part listed in the description.

If you do the same, you could replace a part that is good, costing you more money than necessary. This would be a shame if you only needed to top off the transmission fluid. For this reason, we always recommend walking through the diagnostic steps to determine what’s wrong before replacing parts. 

How to Diagnose the P0740 Trouble Code?

If you have a compatible code scanner , you can easily start the diagnostic process. Sadly, you need more than the free code scan service offered by your local auto parts store . Follow these steps to get started.

• Check for other DTCs. If there are other codes, you may be able to piece them together to figure out what’s wrong. 
• Check the transmission fluid level and top it off if needed. You should also check the quality of the fluid. If it looks contaminated or old, change the fluid. Compare it against a transmission fluid color chart to see where it stands. 
• Look at the transmission wiring harness to see if there’s any corrosion, fraying or damage. If you notice trouble with a connector or wire, replace it. 
• If you have a digital multimeter , you can run some further tests. Start by finding the wiring diagram for your vehicle in the service manual.
• Touch the multimeter to the pins that correspond with each side of the clutch solenoid circuit and the transmission’s internal harness or transmission control module. Check all of the connections to ensure the appropriate amount of ohms. 

If you need to perform a diagnosis beyond what we’ve outlined, you may want to visit a mechanic. Some of the steps can get more complicated and they aren’t necessarily for the untrained. When dealing with the transmission, it’s best to avoid causing any more damage. 

How Much Does It Cost To Fix Code P0740?

Once you’ve walked through the diagnostic steps, you should have a better idea of what needs to be fixed. Your next step is to determine what that fix might cost. On average, we have some estimates that include both parts and labor. However, if you can perform the repair yourself, the cost might be lower. 

• Replace torque converter clutch solenoid – $55 to $555
• Replace torque converter – $450 to $1,550
• Repair electrical malfunction – $50 to $550
• Add/change transmission fluid – $50 to $350
• Replace or rebuild transmission – $1,250 to $5,500
• Update/replace PCM – $550 to $2,500

A Mechanic’s Tips About The P0740 Code

Along with the P0740 trouble code, you may notice several others in your reader. These could include the following:

• P0741: Torque Converter Clutch Solenoid Circuit Performance/Stuck Off
• P0742: Torque Converter Clutch Circuit Stuck On
• P0743: Torque Converter Clutch Solenoid Circuit Electrical

Most of these codes have the same symptoms, causes and fixes related to them. You would want to run through the same diagnostic steps. 

With all of these codes, there’s a simple way to prevent problems. By changing the transmission fluid and filter at recommended service intervals, you ensure that the internal parts of the transmission get the lubrication needed. This simple step keeps the transmission running at its best, so there are fewer problems with the torque converter. It also keeps debris from creating a restriction that could cause serious issues. 

Is code P0740 serious?

Yes, the car’s transmission isn’t going to operate normally if there’s a problem causing the P0740 code. Therefore, shifting could be erratic and performance hindered. The inability to drive normally could cause an accident or you could create more transmission damage by continuing to drive the car this way.

How do I fix error code P0740?

It depends on what is causing the problem. In many cases, the transmission fluid either needs to be topped off or changed. Otherwise, there could be an electrical short, a damaged solenoid or a bad torque converter. In rare cases, transmission failure or a defective PCM is to blame.

Can I drive with a P0740 code?

No, while the transmission isn’t shifting right, you should stop driving. Continued wear during this time could cause transmission failure. Additionally, the erratic shifting and performance problems could cause an accident. 

How much does it cost to replace a torque converter clutch solenoid?

If the torque converter clutch solenoid is located in an easy-to-access location, your cost will be low. It doesn’t typically cost more than $300 to replace. It could be even cheaper if you do it yourself. However, if the transmission or converter housing needs to be moved to gain access, you can expect a higher repair bill. 

How do I know if my TCC solenoid is bad?

If the torque converter clutch solenoid fails in an open position, you may not notice more symptoms than erratic shifting, a Check Engine Light and overheated transmission. If the TCC solenoid fails in a closed position, it causes the engine to stall since the transmission can’t slip. 

With the P0740 trouble code set in your car’s computer, you need to take swift action. It’s important to get to the bottom of what’s going on, so you can avoid permanent transmission failure. If you’ve ever priced out the cost of a rebuilt or used transmission, you know this is something you don’t want to deal with.

If you have some basic tools, it’s not hard to do a little diagnostic work on your own vehicle. However, if you ever feel overwhelmed or unable to complete the process, it’s best to take it to a mechanic. We would rather see a car come into the shop than someone try to work on it and cause more problems. 

Categories: OBD Codes

Related Posts

Latest Posts

• The Best & Worst Years Of Ford Explorer
• Best & Worst Years Of Toyota Corolla
• Best & Worst Years of Toyota RAV4
• When Should Your Child Switch To A Forward-Facing Car Seat?
• The Best & Worst Years Of Toyota Camry
• I Accidentally Put Premium Gas In My Car, What To Do?

Press ESC to close

Dodge code p0740: a comprehensive guide to understanding and fixing the transmission issue.

Introducing our latest article on Mechanics News: “Decoding the Mystery: Understanding Code P0740 in Dodge Vehicles”. In this informative piece, we delve deep into the specificities of code P0740, a common diagnostic trouble code found in Dodge cars. We’ll shed light on what this code signifies, its potential causes, and steps to diagnose and address the issue. So, buckle up and join us as we unravel the complexities of code P0740, empowering mechanics and car enthusiasts alike. Stay tuned for expert insights and practical solutions!

What is Code P0740 Dodge?

Code P0740 Dodge is a diagnostic trouble code that indicates a problem with the torque converter clutch (TCC) circuit in a Dodge vehicle. It specifically refers to a malfunction within the TCC solenoid or the electrical circuit that controls the TCC.

Symptoms of Code P0740 Dodge

When a vehicle experiences Code P0740 Dodge , there are several symptoms that may occur. These can include an illuminated check engine light , harsh shifting or slipping gears , poor fuel economy , and overheating transmission . Additionally, the vehicle may fail to engage the TCC, resulting in a decrease in overall driving performance.

Possible Causes of Code P0740 Dodge

The most common causes of Code P0740 Dodge include a faulty TCC solenoid , damaged wiring or connectors in the TCC circuit, or a defective torque converter clutch . Other potential causes could be a low transmission fluid level , dirty transmission fluid , or mechanical issues within the transmission .

Diagnosing Code P0740 Dodge

To properly diagnose Code P0740 Dodge , a mechanic will use a diagnostic scanner to retrieve the trouble codes stored in the vehicle’s onboard computer. They may also perform various tests, such as checking the TCC solenoid resistance, inspecting the TCC circuit for any damage, and conducting a thorough examination of the transmission fluid.

Repairing Code P0740 Dodge

Repairing Code P0740 Dodge will depend on the specific cause of the issue. In some cases, simply replacing the TCC solenoid or repairing damaged wiring may resolve the problem. However, if the torque converter clutch itself is faulty, it may require replacement. It is important to address this issue promptly to prevent further damage to the transmission and ensure optimal vehicle performance.

Machine fanatics ask

What does the code p0740 on my dodge mean.

The code P0740 on your Dodge usually indicates a problem with the torque converter clutch circuit. This code is commonly associated with transmission issues and could be caused by a faulty torque converter clutch solenoid, a damaged wiring harness, or a malfunctioning torque converter itself. It is recommended to have a professional technician diagnose and repair the issue to ensure proper functionality of your vehicle’s transmission system.

How do I diagnose and fix a P0740 code on my Dodge?

Diagnosing and fixing a P0740 code on a Dodge requires a systematic approach. Firstly, you should check the transmission fluid level and condition. If it’s low or contaminated, it could trigger the code. Next, inspect the torque converter clutch solenoid and wiring connections for any damage or loose connections. It’s also essential to scan the vehicle’s computer system with an OBD-II scanner to retrieve any additional trouble codes or freeze frame data. If these steps don’t resolve the issue, it’s recommended to consult with a qualified mechanic or dealership for further diagnosis and repair.

Can I still drive my Dodge when the P0740 code is present?

Yes , you can still drive your Dodge when the P0740 code is present. However, it is important to address the issue as soon as possible to prevent further damage to your vehicle.

Are there any common causes for the P0740 code in Dodge vehicles?

Yes, there are common causes for the P0740 code in Dodge vehicles. Some of them include a faulty torque converter clutch solenoid, low transmission fluid, a malfunctioning torque converter clutch circuit, or a damaged torque converter itself. These issues can lead to improper torque converter lock-up and trigger the P0740 code.

Is there a recall or technical service bulletin related to the P0740 code in Dodge models?

No, there is currently no recall or technical service bulletin related to the P0740 code in Dodge models.

In conclusion, the code P0740 in Dodge vehicles is a common issue that often requires attention from owners and mechanics alike. This article has aimed to shed light on the implications of this code, its causes, and potential fixes. It is important for Dodge owners to be aware of this issue and promptly address it to ensure the longevity and smooth performance of their vehicles.

By understanding the underlying problems associated with the code P0740, Dodge owners can make informed decisions regarding repairs and maintenance. Whether it is a faulty torque converter, solenoid issues, or transmission fluid problems, it is crucial to diagnose and remedy the root cause effectively to avoid further damage and expensive repairs .

Furthermore, staying well-informed about potential signs and symptoms related to this code is essential. Regularly checking engine lights, monitoring gear shifting patterns, and paying attention to any unusual noises or vibrations can help early detection and prevention of code P0740 . This, in turn, can save significant time, money, and frustration in the long run.

In this ever-evolving automotive landscape, Popular Mechanics Magazine aims to provide readers with reliable information and practical solutions. Understanding code P0740 in Dodge vehicles is just one piece of the puzzle, but an important one. By consistently staying informed and proactive, Dodge owners can tackle these challenges and ensure their vehicles continue to perform optimally for years to come.

Looking to get your snowmobile ready for winter? In this article, we'll guide you through the process of performing a Read more

Problems and Complaints about the 2001 Chevrolet Impala If you own or are considering purchasing a 2001 Chevrolet Impala, it's Read more

Welcome to Mechanics News, your go-to source for the latest updates in the world of mechanics. In today's article, we Read more

Welcome to Mechanics News, where we bring you the latest updates and insights from the world of mechanics. In this Read more

Welcome to Mechanics News! In this article, we will dive into the world of Subaru XT fuel pressure testing. As Read more

Welcome to Mechanics News! In this article, we will delve into the important topic of fleet identification numbers. These unique Read more

At what mileage is it recommended to align, balance and rotate a new tire? As a mechanics teacher, I often Read more

Introducing the Honda Accord B124 Service Cost: Unveiling the Price of Quality Maintenance Welcome to Mechanics News! In this article, Read more

Categorized in:

About the Author

Mark Smith is a versatile individual with a unique combination of skills and expertise. As a journalist and mechanical engineer, he has made significant contributions to the field of automobiles and trucks. Mark's extensive knowledge in both journalism and engineering allows him to provide insightful and detailed analysis of various automotive topics. With a background in mechanical engineering, Mark possesses a deep understanding of the technical aspects of vehicles, including their design, functionality, and performance. His expertise in this area enables him to dissect complex engineering concepts and present them in a comprehensible manner to his audience. As a journalist, Mark excels at researching, investigating, and reporting on automotive news and developments. He has a keen eye for detail and a knack for storytelling, which enables him to deliver engaging and informative articles. Mark's writing style is characterized by his ability to present technical information in a way that is accessible to readers from different backgrounds, whether they are automotive enthusiasts or simply interested in staying updated with the latest industry trends.

Related Articles

Ultimate Guide: Transporting Water Heater in Pickup Truck

Bunk Heater and AC for Semi Truck: Ultimate Comfort Solution

How to Lease Your Truck to Your Company: A Step-by-Step Guide

Don Baskin Truck Sales in Covington Tennessee: Your Next Truck Awaits

Steering Assist is Reduced Drive With Care – Expert Guidelines

Understanding the ECM on a Truck: Everything You Need to Know

Chevy Bolt: Resolving Incorrect Shift Conditions

Can You Swap a 6.0 into a 5.3 Truck? Engine Upgrade Guide

Leave a reply cancel reply.

Save my name, email, and website in this browser for the next time I comment.

Post Comment

CarParts.com will be back soon!

We apologize for the inconvenience. The CP Team is working on some upgrades to improve our service. Thank you for using CarParts.com!

You can call us at

1-866-529-0412

Reference ID: 18.7fc733e.1717767671.63faf69

Chrysler Town and Country P0740: Torque Converter Clutch Circuit Malfunction

P0740 is one of the most common transmission trouble codes. It means that the Town and Country ‘s computer has detected that there is an issue with the torque converter clutch (TCC) solenoid circuit.  

P0740: Torque Converter Clutch Circuit Malfunction

The TCC “locks” the drivetrain, which allows for a true mechanical connection between the transmission and the engine.  In effect, this allows an automatic transmission to function like a manual transmission at certain speeds and engine loads, and eliminates all slipping from the transmission.

P0740 Symptoms:  Chrysler Town and Country

The symptoms of P0740 vary greatly.  If the converter stays unlocked, it can be a nuisance.  If it locks when it shouldn’t be, that’s where it can get dicey.

The most common symptoms include:

• Poor Gas Mileage-  If the converter is not locking at speed, the engine’s RPM’s will stay higher.  This decreases fuel mileage.
• Stutters and Stalls-  This would be a symptom of the transmission locking when it should not be.  It feels exactly like when you need to downshift in a manual transmission.
• Higher RPM on highway-  If the converter is not locking, it can lead to higher RPM on the highway.  This increases fuel mileage and makes the transmission operate at a higher temperature.
• Service Engine Soon Light

Here’s a great video on diagnosing this code:

P0740 Causes Chrysler Town and Country

There are many different things that can cause the P0740 code.  Most of them are going to need an experts touch to diagnose.  

This list is presented with a combination of likely to cause the issue and repairability in mind first.  

Transmission Fluid

If there isn’t enough transmission fluid, the transmission will not be able to operate normally. There are many symptoms of low transmission fluid .  The most noticeable one is going to be the transmission slipping .  

If the transmission fluid is dirty or burnt , it can make the transmission behave in a way that is not normal and throw the P0740 code.  Here’s a pretty good guide on transmission fluid color .

If the fluid is low or bad, replacing should be considered an urgent priority.  The good news is that transmission fluid and filters are cheap .

Wiring Issues

The wiring harness that goes to and from the transmission is one of the more vulnerable pieces of wiring on a vehicle.  Inspecting the harness for obvious signs of distress, checking the connection at the transmission itself, and finally a continuity test can go a long way in diagnosing your Town and Country.

TCC Solenoid

It is highly likely that the torque converter clutch solenoid (TCC) has gone bad.  But, jumping straight to this conclusion without inspecting the transmission fluid and wiring can cause a lot of undue headache.

Torque Converter

The torque converter itself or torque converter clutch can go bad and throw the P0740 code. 

Problem in the Case

If the TCC seems to be functioning properly, it may be that the problem is in the transmission case itself.  It could be a valve body issue, a problem with the pressure going through the transmission, or a clogged filter.

Articles on this site are always written with the DIY enthusiast in mind.  Most of the time, you’re not looking these codes up for casual reading.  You’re looking them up to fix your vehicle.  We would never want to discourage that.  With that being said, P0740 is a tougher code to diagnose and is often out of the range of the shade tree mechanic.  

If there is anything that you would like to add, please feel free to leave a comment.

P0740: TCC Solenoid Circuit/Open Circuit Malfunction

Our mobile mechanics can quickly diagnose a p0740 trouble code and bring the shop to you 7 days a week. get a quick and fair quote today..

Find Your Cost

What is P0740?

The diagnostic trouble code or DTC P0740 stands for “Torque Converter Clutch Solenoid Circuit/Open Circuit Malfunction.”

The error code basically means that the Powertrain Control Module (PCM) has caught some issue within the torque converter clutch (TCC) circuit (or torque converter clutch solenoid circuit).

The Powertrain Control Module uses the torque converter clutch to optimize car performance by lowering engine RPMs, reducing transmission fluid temperature, and improving fuel economy. If there’s any abnormality in the application of the torque converter clutch, the Powertrain Control Module will set off your check engine light (malfunction indicator lamp).

It’s important to note that many vehicle manufacturers don’t list P0740 as a possible code.

However, for the manufacturers that consider it a possible code, P0740 typically indicates that the control module (PCM or Transmission Control Module) senses an electrical fault with the torque converter clutch solenoid. It can also be an electrical fault with the solenoid’s circuit.

For some vehicles, the P0740 code is more telling of a mechanical problem with the transmission or torque converter.

How Does The Torque Converter Clutch Circuit Operate?

The TCC solenoid valve, an electrical device, is used with the torque converter clutch pulse width modulation (TCC PWM) solenoid valve to control TCC application and release.

The TCC solenoid valve connects to the transmission case assembly extending into the pump cover. This solenoid valve acquires ignition voltage via the Off/On/Crank voltage circuit.

The PCM regulates the solenoid by providing the ground path on the torque converter clutch solenoid valve control circuit. The PCM observes the throttle position sensor voltage, the vehicle speed, and other inputs — which helps it decide when to energize the TCC solenoid valve.

So when the PCM witnesses a continuous open, short to ground, or short to power in the TCC solenoid valve circuit, DTC P0740 is triggered. 

Common symptoms

You may first notice the check engine light (malfunction indicator lamp) illuminating. Apart from the engine light, here are some of the most common symptoms that your car may experience on detecting the P0740 code:

• Transmission won’t shift in or out of a particular gear
• Transmission overheats
• Limited transmission gear range
• Harsh transmission shifting
• Reduced fuel economy
• Increase in engine speed
• Car engine stalls
• A gear box warning light may appear
• Car shudders at certain speeds 

Can I still drive?

Not all check engine light codes mean danger in driving. However, code P0740 is serious because it can easily disrupt your normal driving experience .

Located between the transmission and the engine, the torque converter equalizes the engine speed by multiplying the torque to optimize vehicle performance. That means increasing fuel efficiency and reducing the transmission fluid temp.

But when the code P0740 is triggered, it implies that the PCM isn’t fully controlling the torque converter, causing drivability issues. You don’t want to be stuck at the 3rd or 4th gear forever.

So if you suspect or detect the DTC P0740, get the issue diagnosed and fixed as soon as possible. If you don’t, you risk getting stranded on the side of the road.

P0740 causes

This trouble code can be triggered for numerous reasons and can differ depending on whether your car is made by Volkswagen AG, Honda motor company, Mercedes, or any other manufacturer.

Here’s a quick list of the potential causes:

• Transmission Fluid Issue:
• Incorrect transmission fluid level
• Internal transmission damage
• Low transmission fluid level
• Contaminated transmission fluid
• Powertrain Control Module Issue:
• A faulty Powertrain Control Module
• Problem with the Powertrain Control Module, such as software that needs an update
• Transmission Problem:
• Defective transmission converter clutch solenoid 
• Clogged transmission filter
• The torque converter clutch won’t engage or disengage
• Faulty sensor inhibiting proper torque converter clutch operation
• Issues with the transmission valve body
• Faulty torque converter clutch solenoid valve
• Irregular transmission maintenance
• A restriction within the transmission
• A faulty Transmission Control Module (TCM)
• Wiring Issue:
• Faulty or corroded wiring to the torque converter clutch or TCC solenoid
• Open or shorted torque converter clutch solenoid valve harness or connector
• A torque converter clutch solenoid valve circuit has a poor electrical connection
• Torque Converter Problem:
• A faulty torque converter clutch solenoid
• A damaged torque converter or clutch
• Electrical fault inside the TCC solenoid circuit

Code P0740 can be caused by a faulty solenoid to a very pricey internal transmission problem. That’s why there isn’t a single fix for this code.

And since the diagnostic trouble code P0740 is severe, you should let a mechanic or transmission shop do a proper inspection and handle the repairs.

Here’s how a mechanic at a transmission shop will go about it:

Note: If there’s nothing wrong with the transmission fluid, your mechanic will follow a manufacturer-recommended diagnostic procedure to fix the issue. Remember that this diagnostic code may need removing or disassembling the transmission.

• First, they’ll check if there are other DTCs. If any other codes exist apart from DTC P0740, they’ll thoroughly diagnose each before continuing with repairs.
• Then they’ll check the transmission fluid for proper level and condition. If something looks odd, it may be the cause of the code P0740.
• Once done, your mechanic will visually inspect the transmission wiring harness to look for signs of damage, fraying, or corrosion.
• Then they’ll move on to check for continuity across the affected circuit. They do so using a multimeter set to the ohms scale. They’ll also use a factory-specific wiring diagram. The diagram will help them look for the appropriate pins corresponding to each end of the clutch solenoid circuit at their connection points with the transmission (internal harness) and transmission control module.
• Then your mechanic will check for: a) Signs of a short-to-ground condition within the external portion of the harness, and b) Excessive resistance or open conditions within the internal harness or clutch solenoid.
• Finally, they’ll locate the affected wiring harness or connector and repair it as necessary. In case continuity testing reveals that the issue lies within the transmission, your mechanic will extract the transmission oil pan in most automatic transmission cars.

After removing the transmission pan of an automatic transmission vehicle, they’ll conduct further testing of the clutch solenoid as specified by your particular vehicle’s manufacturer.

Note: Some codes related to P0740 include:

• P0741 : Torque Converter Clutch Solenoid Circuit Performance/Stuck Off
• P0742: Torque Converter Clutch Circuit Stuck On
• P0743: Torque Converter Clutch Solenoid Circuit Electrical

Possible repairs for P0740 & Costs

Since the trouble code can be triggered due to multiple reasons, here’s a list of different repairs that your mechanic may perform to fix the P0740 code:

• Replacing the torque converter clutch or TCC solenoid
• Adding or replacing the transmission fluid and filter
• Repair faulty wiring to torque converter clutch (TCC) solenoid
• Repair connector plugs to the torque converter clutch solenoid
• Repairing or replacing the car’s existing transmission
• Replace the transmission control module (TCM)
• Replace the Powertrain Control Module

4 FAQS About P0740

Here are some FAQs related to P0740 and its affected parts:

1. What Are The Most Common P0740 Diagnosis Mistakes?

Whether you have a Volkswagen AG or a car by the Honda motor company, it’s common to assume that the torque converter needs to be replaced or rebuilt — when it could just be a faulty TCC solenoid or dirty transmission fluid.

Another common diagnostic mistake is believing the issue is caused by an engine misfire, a driveline, or an internal transmission problem.

The trick is to look at every aspect of each problem because it can reveal the correct solution quickly and efficiently.

2. What Is The Normal Operating Automatic Transmission Temperature?

The fluid temp in the automatic transmission would ideally range from 170-225 degrees Fahrenheit. If the transmission is slipping, the fluid temp could go above 240 degrees.

3. What Is A Valve Body?

A transmission valve body is an important component of an automatic transmission. It’s a maze-like control center made with valves, passageways, and solenoids that direct transmission fluid to where it’s required for gear changes.

So every time you move to the 2nd or 4th gear, you can thank the valve body.

4. Is CVT Fluid The Same As Automatic Transmission Fluid?

No, they aren’t.

CVT fluid is for vehicles utilizing a Continuously Variable Transmission (CVT) system, which has a different mechanism than Automatic Transmission systems. Automatic transmission fluid (ATF) has a different chemical composition than CVT fluid, so they’re not interchangeable.

How It Works

Tell us about your vehicle.

Select your vehicles year, make, and model and the repair service you need.

Book online

Get a free quote, book an appointment, and speak to a specialist – all online!

Schedule your repair

Pick a time that works best for you and our mobile mechanics will bring the shop to you.

12-Month | 12,000-Mile Warranty

Looking for a Related Repair?

Related repairs.

Not sure? Let us diagnose

We're here to keep you moving

Our experienced mobile mechanics are ready to help..

1-Year | 12,000-Mile Warranty

[SOLVED] P0740 Code: Fix Torque Converter Clutch Malfunction With Ease!

The automobile fault code P0740 indicates a problem with the torque converter clutch solenoid valve in the transmission. Symptoms may include slipping or overheating of the transmission, poor fuel efficiency, and the check engine light turning on. The most common causes are low transmission fluid level, dirty transmission fluid, or a faulty solenoid valve.

Repairing this issue is important to prevent further damage to the transmission. The difficulty of the repair can vary depending on the specific cause, but it is recommended to visually inspect the wiring harness and connectors for any damage or poor connections.

Checking for broken, bent, pushed out, or corroded pins in the connectors is also crucial. The repair time for this issue is estimated to be around 1.0 hour. To interpret the fault code, it is necessary to check the “Possible Causes” listed above and perform the suggested inspections and repairs.

Decode P0740: Unveiling The Symptoms Of This Automobile Fault Code

Experiencing issues with your vehicle’s transmission?

Check out the symptoms of the p0740 fault code below.

• The symptoms of the automobile fault code P0740 include: – Check Engine Light (CEL) is illuminated – Transmission slips or delays when shifting gears – Harsh or rough shifting between gears – Decreased fuel efficiency – Overheating of the transmission – Transmission may go into “limp mode” or fail to engage in any gear.

Unveiling The Culprits: Code P0740 Possible Causes

The automobile fault code P0740 can be caused by various factors, including low transmission fluid level, dirty fluid, and faulty solenoid valves.

• The fault code P0740 can be caused by: low transmission fluid level, dirty transmission fluid, faulty torque converter clutch solenoid valve, open or shorted torque converter clutch solenoid valve harness, and poor electrical connection in the torque converter clutch solenoid valve circuit.

Fixing Code P0740: The Ultimate Guide To Resolving Transmission Issues

To fix the p0740 fault code, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

• To fix the automobile fault code P0740, start by checking the possible causes mentioned above.
• Then, visually inspect the wiring harness and connectors related to the issue.
• Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins.
• This fix typically takes around 1.0 hour to complete.

Cracking The Code: P0740 Fixing Cost And Complexity Unveiled!

The factors influencing the cost of diagnosing and fixing the automobile fault code P0740 are the estimated repair time of 1.0 hour and the typical auto repair shop charges of $75 to $150 per hour.

Decode P0740: Unveiling Symptoms And Solutions

If you see the Engine Light ON or the Service Engine Soon Warning Light, it could be due to the fault code P0740.

This code is associated with transmission issues.

One symptom of this fault code is experiencing a transmission shift shock. You may also notice that your vehicle is not shifting into the highest gear.

It’s important to address this issue promptly to avoid further damage to your transmission.

The fault code P0740 in an automobile can be caused by various factors. These include a low transmission fluid level, dirty transmission fluid, a faulty torque converter clutch solenoid valve, an open or shorted torque converter clutch solenoid valve harness, or a poor electrical connection in the torque converter clutch solenoid valve circuit. To fix this issue, it is recommended to check the possible causes mentioned above. Additionally, visually inspect the wiring harness and connectors for any damage, and look for broken, bent, pushed out, or corroded pins in the connectors.

To visually inspect the wiring harness and connectors related to the P0740 fault code, start by checking the possible causes such as low transmission fluid level, dirty transmission fluid, faulty torque converter clutch solenoid valve, open or shorted torque converter clutch solenoid valve harness, and poor electrical connection in the torque converter clutch solenoid valve circuit. Look for any damaged components and examine the wiring harness and connectors for any signs of damage, including broken, bent, pushed out, or corroded pins.

When checking for damaged components or corroded connector pins in relation to the P0740 fault code, there are a few things to keep in mind. First, check the transmission fluid level and ensure it is not low or dirty. Next, inspect the torque converter clutch solenoid valve and its wiring harness for any faults or poor electrical connections. Finally, visually inspect the wiring harness and connectors, looking for any signs of damage such as broken, bent, pushed out, or corroded pins.

To fix the P0740 fault code, start by checking the transmission fluid level and ensuring it is at the correct level. Next, inspect the transmission fluid for any dirt or contamination.

Then, examine the torque converter clutch solenoid valve and its wiring harness for any damage or poor electrical connections.

Finally, visually inspect the wiring harness and connectors for any signs of damage or corrosion.

• Forum Listing
• Marketplace
• Advanced Search
• The Minivan Mopar Garage
• 4th Generation Chrysler Minivans: 2001-2007

P0740 what would you do?

• Add to quote

My 06 T&C has the P0740 P0700 sickness. I drive 120 to 150 miles daily. Code comes and goes on its own. 3/4 of the miles are 35 to 60 mph. Codes out in afternoons after about 10 to 15 minutes of 60mph and when increasing to 65 to 70, with in a mile it sets the CEL. It will remain on till the next day and self clears some time during lower speed operation combined with my normal 20 plus start and stops during the first half of my day. Fluid and filter change done. Pan clean very little fuzz on the magnet. Last change was 50k ago and also nothing odd. Allways ATF4+. Shift solenoid has also been ruled out. Which would you do next? Pull valve body, clean and install shift kit (have a sonnax kit here in "stock")? Change torque converter? Above together? Get the used 41TE I located with 25k on it? I though about a full rebuild but I'm not interested in the extra tools even tough I could sell them off when I'm done with them. And I am not willing to spend more than the $500 for the used trans. Any more and I will just sell it and buy wife another vehicle and steal the 03 GC from her. Just cant decide which to do and thought I would appeal to the brain trust. Wish I never sold my 03 Caravan!  

I would get my hands on a scan tool that can read the CVI's and do clutch tests. If all of those things look good I would replace the torque converter and the pump seal.  

Think Jee34's app would work? Been holding out for an Android version. Obviously I failed to consider checking CVIs, Thanks.  

Not familiar with his app, do you have a link?  

There's a link in the first post in the following thread: A tool to diagnostic 41TE-transmissions  

You described everything related to the code, but didn't mention anything about how the tranny is operating. Is lockup failing to happen all the time, or just when the cel is on? Any harsh shifts or other symptoms? Has your highway MPG gone way down? A couple things seem to be in the mix for this code. First being the PCM/TCM and solenoid wiring and connectors, any of which having a problem could cause this code to be set. And although I have no idea if it's possible to get a P0740 from a bad tranny temp sensor/connector/wiring, it is part of the input that the TCM is using to determine lockup. No first hand experience with this, just mentioning things you might consider, which could lead to a much easier resolution for the P0740 than the options you're considering.  

cvguy said: You described everything related to the code, but didn't mention anything about how the tranny is operating. Is lockup failing to happen all the time, or just when the cel is on? Any harsh shifts or other symptoms? Has your highway MPG gone way down. Click to expand...

The 90's GM FWD cars could set this code if they had a bad brakelight switch.  

ECU and wiring have been ruled out so I have opted to replace the transmission for now. I purchased a used one with 100 miles listed on it out of another 2006 that showed IIHS in the listing. I thought about where I knew those initials from, I know I'd seen it somewhere before. The IIHS, Insurance Institute for Highway Safety, is located north of Charlottesville VA. They side impact tested 2 06's and I found a salvage yard that had one of the front clips. Yet another advantage of living here in VA. Gonna change the seals, filter and refill and drop it in this weekend. Think I'll keep the old one and rebuild it in the near future. Thanks for the thoughts and suggestions.  

Finding a 2006 tranny with 100 miles is a score! Not everyday you come across one of those! Now that van will surely last many, many more years given you install the tranny.  

• ?            
• 577.3K posts
• 82.5K members

Top Contributors this Month