P0740 OBD-II Trouble Code: Torque Converter Clutch Circuit Malfunction

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0740 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0740 code

P0740 is a diagnostic trouble code (DTC) for "Torque Converter Clutch Circuit Malfunction". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0740 DIAGNOSTIC Get a fair and transparent estimate upfront

P0740 Code Definition

Torque converter clutch circuit malfunction is the technical definition of this trouble code

What the P0740 code means

What the P0740 code means is that the powertrain control module (PCM) has detected something unusual within the torque converter clutch circuit. The powertrain control module can vary the application of the torque converter clutch for optimal vehicle performance. If the torque converter clutch application is abnormal (usually multiple times) the powertrain control module will trigger a Check Engine Light.

What are the causes of the P0740 code?

Some potential causes of the P0740 code may include:

  • A faulty torque converter clutch solenoid
  • A damaged torque converter or clutch
  • Incorrect transmission fluid level
  • Skipping over transmission maintenance
  • A restriction within the transmission
  • Internal transmission damage
  • A faulty powertrain control module or transmission module

What are the symptoms of the P0740 code?

Symptoms of a P0740 code that the driver may experience would include:

  • The transmission not shifting in or out of a particular gear
  • The transmission may shift harshly
  • The torque converter clutch may not engage or disengage causing the vehicle not to move
  • The engine may stall
  • The transmission could overheat

How does a mechanic diagnose the P0740 code?

A mechanic may begin the diagnosis of the P0740 code by first checking the transmission fluid for proper level and condition. If anything is out of the ordinary, this could be part of the problem. If nothing is wrong with the transmission fluid, the mechanic would then use service information to look up a diagnostic procedure for this code given by the manufacturer and then follow the instructions given. Keep in mind that this diagnostic may require the transmission to be removed or even disassembled.

Common mistakes when diagnosing the P0740 code

An easy mistake that could be made is assuming that the torque converter is damaged just because this part is listed in the trouble code. This may result in a lot of money being spent to have it replaced, when it may just be the fluid level needing to be topped off. It is important to look at every aspect of each problem to get to the correct solution as quickly and efficiently as possible.

How serious is the P0740 code?

The P0740 code can be very serious as it can cause drivability issues. This is one of the codes that can leave a driver stranded on the side of the road. A good running engine means nothing without a properly operating transmission to transfer the engine power to the wheels. It is a good idea to have this issue diagnosed and repaired as soon as possible.

What repairs can fix the P0740 code?

Repairs that can fix the P0740 code may include:

Additional comments regarding the P0740 code

In order to help prevent trouble codes such as the P0740 code, it is a good idea to replace the transmission fluid in your vehicle along with the filter (if applicable) at the recommended intervals. Doing this will ensure that the internal parts of the transmission stay well lubricated and also prevents debris from causing a restriction within the transmission.

Need help with a P0740 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220.

P0740
trouble codes
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0740 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

4,810

Rating Summary
4,424
187
47
28
124
4,424
187
47
28
124

Joel

19 years of experience
741 reviews
Joel
19 years of experience
Acura RL - Check Engine Light is on - Jacksonville, Florida
very knowledgeable and precise. able to fix electrical issues in my car. Right on time for the appointment.

Christopher

15 years of experience
41 reviews
Christopher
15 years of experience
Honda Accord - Check Engine Light is on - Fairburn, Georgia
Christopher was excellent! He explained everything in detail to make sure I understood. He was professional and provided me with the next course of actions to resolve my care issues. I'm glad he was sent to service my car.

Alexander

18 years of experience
58 reviews
Alexander
18 years of experience
Saab 9-7x - Check Engine Light is on - Kissimmee, Florida
He was very friendly and very helpful . I felt like it was being around a close friend , also gave me so very good advice on my car & future advice about it . Highly recommend mechanic, would use his services again .

Matthew

31 years of experience
639 reviews
Matthew
31 years of experience
Jeep Patriot - Check Engine Light is on - Norfolk, Virginia
Matthew was on time which was a relief, he is very knowledgeable and was easy to understand what was wrong and what was being done. I am recommending to friends and family due to the great experience Matthew gave me. Extremely professional 10/10

More related articles

P2093 OBD-II Trouble Code: A Camshaft Position Actuator Control Circuit High Bank 2
P2093 P2093 code definition The P2093 code is a general OBD-II diagnostic trouble code indicating a fault with the “A” camshaft position actuator control circuit high bank 2. What the P2093 code means The camshaft position sensor “A” is indicating...
B1300 OBD-II Trouble Code: Power Door Lock Circuit Failure
B1300 means there is an error with the power door lock circuit, likely caused by a defector power door lock relay or power door lock actuator.
P0095 OBD-II Trouble Code: Intake Air Temperature Sensor 2 Circuit
P0095 P0095 code definition Intake Air Temperature Sensor 2 Circuit What the P0095 code means The intake air temperature sensor transmits a signal correlating to the density of the air coming through the intake to the Engine Control Module (ECM)....

Related questions

Yaw sensor needs replacement

Hi there. Yes, the sensor, along with the dependent systems, require what is called a "zero point" calibration when it is replaced. The dealership does not have to be the entity that performs this calibration. However, it is dependent upon...

problem starting engine

Hello there, thank you for asking about your 2011 BMW X5. This may be a variety of potential issues but most likely related to a fuel delivery problem. Try checking idle air control module which regulates the air flow intake...

What Are the Top Transmission Problems That Should Never Be Ignored?

Ignoring problems with cars is like ignoring problems with teeth. Waiting longer usually just results in more pain and expense. Seeing transmission fluid on the ground under your vehicle should get your attention right away. Transmission fluid is usually reddish-brown....

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com