Engine-Codes.com
Engine-Codes – GMC – P0742 2014 GMC Sierra

P0742 2014 GMC Sierra Code - Torque Converter Clutch System Stuck On Or Transmission Hydraulic/Mechanical Performance

Quick Answer

The P0742 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the Torque Converter Clutch (TCC) system being stuck on or issues with the transmission's hydraulic or mechanical performance. Common causes include Faulty TCC solenoid, Low transmission fluid levels or dirty fluid, Malfunctioning TCC valve. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0742 2014 GMC Sierra indicates Torque Converter Clutch System Stuck On Or Transmission Hydraulic/Mechanical Performance.
Common causes
Common causes include Faulty TCC solenoid, Low transmission fluid levels or dirty fluid, Malfunctioning TCC valve.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0742 2014 GMC Sierra Description

The P0742 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the Torque Converter Clutch (TCC) system being stuck on or issues with the transmission's hydraulic or mechanical performance. The TCC is a critical component of the automatic transmission system that helps improve fuel efficiency and reduce heat buildup. When the TCC is stuck on, it can lead to various performance issues and potentially cause long-term damage to the transmission.

OBDII Code P0742 2014 GMC Sierra - Torque Converter Clutch System Stuck On Or Transmission Hydraulic/Mechanical Performance
P0742 2014 GMC Sierra Code - Torque Converter Clutch System Stuck On Or Transmission Hydraulic/Mechanical Performance

Common Causes of P0742 2014 GMC Sierra

  1. Faulty TCC solenoid
  2. Low transmission fluid levels or dirty fluid
  3. Malfunctioning TCC valve
  4. Wiring or electrical issues
  5. Internal mechanical problems within the transmission

Symptoms of P0742 2014 GMC Sierra

  1. Decreased fuel efficiency
  2. Harsh or delayed shifting
  3. Overheating of transmission fluid
  4. Illumination of the Check Engine Light
  5. Reduced overall performance and acceleration

How to Fix P0742 2014 GMC Sierra

  1. Begin by checking the transmission fluid level and condition. Top off or replace the fluid if necessary.
  2. Inspect the TCC solenoid, valve, and wiring for any signs of damage or malfunction. Replace any faulty components.
  3. Perform a thorough diagnostic scan to identify any other potential issues with the transmission system.
  4. Clear the DTC and reset the PCM to see if the code reappears after the repair.
  5. Test drive the vehicle to ensure that the TCC system is functioning properly and that the code does not return.

Cost to Fix P0742 2014 GMC Sierra

The typical repair costs for addressing a P0742 code on a 2014 GMC Sierra can range from $200 to $800, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Factors such as location, vehicle make and model, and engine type can also influence repair costs. For a more accurate estimate, it's recommended to consult with a local auto repair shop.

What does this mean?

Tech Notes for P0742 2014 GMC Sierra

When a transmission solenoid is stuck on, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is very dirty, it is recommended to change the transmission fluid and if possible, remove the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a transmission mechanical failure, and that the transmission will need to be rebuilt or replaced.

Need more information about the P0742 2014 GMC Sierra code?

Need more information on how to fix the P0742 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0742 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0742 2014 GMC Sierra Code

1. What does the OBDII code P0742 mean on a 2014 GMC Sierra?

The P0742 code indicates that the torque converter clutch (TCC) system is stuck on or there is an issue with the transmission’s hydraulic or mechanical performance.

2. What are the symptoms of code P0742 in a 2014 GMC Sierra?

Common symptoms include poor fuel economy, rough or erratic shifting, stalling when coming to a stop, and the Check Engine Light being illuminated.

3. What causes the P0742 code on a GMC Sierra?

Possible causes include a faulty torque converter clutch solenoid, low or dirty transmission fluid, damaged wiring or connectors, or internal transmission issues like a stuck valve or worn clutch.

4. Can I drive my 2014 GMC Sierra with a P0742 code?

Driving with this code is not recommended as it can lead to further transmission damage, poor performance, and potential safety concerns.

5. How do I fix the P0742 code on a 2014 GMC Sierra?

Repairs may include replacing the torque converter clutch solenoid, flushing and refilling the transmission fluid, repairing wiring or connectors, or addressing internal transmission problems.

6. How much does it cost to fix a P0742 code on a 2014 GMC Sierra?

The cost depends on the root cause. Solenoid replacement may cost $200-$500, while internal transmission repairs can be significantly higher, often exceeding $1,000.

7. How can I diagnose the P0742 code on my GMC Sierra?

Diagnosis typically involves scanning for codes, inspecting the transmission fluid, testing the TCC solenoid, and checking the wiring and connectors for damage.

8. Can low transmission fluid cause the P0742 code?

Yes, low or dirty transmission fluid can cause the torque converter clutch to malfunction, triggering the P0742 code.

9. Will resetting the Check Engine Light clear the P0742 code?

Clearing the code without addressing the underlying issue will only temporarily turn off the light, and the problem will likely return.

10. Is the P0742 code related to other transmission codes?

Yes, it may occur alongside other transmission-related codes, such as P0741 (TCC performance) or P0700 (general transmission fault), indicating broader issues.

Discuss the causes and fixes for P0742 2014 GMC Sierra OBDII Code

Submit a New Comment

Code P0742 2014 GMC Sierra comments

No comments found for this page.