AutoCodes – Jeep – P0742 Jeep

P0742 Jeep Code - Torque Converter Clutch Stuck On

Quick Answer

The Torque Converter Clutch (TCC) solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to signals sent from the vehicle speed and the Engine Control Module (ECM). Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty torque converter clutch solenoid 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 Jeep indicates Torque Converter Clutch Stuck On.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty torque converter clutch solenoid 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.

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Code Popularity 5,832

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0742 Jeep Description

The Torque Converter Clutch (TCC) solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to signals sent from the vehicle speed and the Engine Control Module (ECM). Lock-up piston operation will then be controlled. When the torque converter clutch solenoid valve is activated, the torque converter lockup clutch will engage creating a 1 to 1 RPM ratio between the transmission input shaft and the rotational speed of the torque converter.
Lock-up operation, however, is prohibited when A/T fluid temperature is too low.
When the accelerator pedal is depressed (less than 2/8) in lock-up condition, the engine speed should not change abruptly. If there is a big jump in engine speed, there is no lock-up.

OBDII Code P0742 Jeep - Torque Converter Clutch Stuck On - AutoCodes.com — P0742 Jeep Code - Torque Converter Clutch Stuck On

What does this mean?

What are the Possible Causes of the DTC P0742 Jeep?

Low transmission fluid level
Dirty transmission fluid
Faulty torque converter clutch solenoid valve
Torque converter clutch solenoid valve harness or connectors
Torque converter clutch solenoid valve circuit is open or shorted
Transmission internal mechanical problem

How to Fix the DTC P0742 Jeep?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

When the 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 recommend changing the transmission fluid and if possible removing 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0742 Jeep code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 Jeep Code

1. What are the common symptoms of OBDII code P0742 in a Jeep related to the Torque Converter Clutch Stuck On?

The common symptoms include engine stalling at idle, decreased fuel efficiency, difficulty shifting gears, and illuminated Check Engine Light.

2. What are the possible causes of the P0742 code indicating Torque Converter Clutch Stuck On in a Jeep?

Potential causes include a faulty torque converter clutch solenoid, low transmission fluid levels, a malfunctioning torque converter, or issues with the transmission control module.

3. How can I diagnose the OBDII code P0742 in my Jeep with the Torque Converter Clutch Stuck On?

Diagnosis involves using an OBDII scanner to retrieve the trouble code, inspecting the transmission fluid level and condition, checking for any wiring or electrical issues, and testing the torque converter clutch solenoid.

4. Can I continue driving my Jeep with the P0742 code indicating Torque Converter Clutch Stuck On?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the transmission and potentially cause unsafe driving conditions.

5. How can I repair the Torque Converter Clutch Stuck On issue indicated by OBDII code P0742 in my Jeep?

Repair options may include replacing the torque converter clutch solenoid, addressing any transmission fluid leaks, repairing or replacing the torque converter, or reprogramming the transmission control module.

6. Is it possible to reset the OBDII code P0742 in a Jeep indicating Torque Converter Clutch Stuck On?

While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent further transmission problems.

7. What should I do if the OBDII code P0742 in my Jeep keeps coming back after repairs for Torque Converter Clutch Stuck On?

If the code persists after repairs, it is recommended to consult a professional mechanic for a thorough diagnosis to identify any underlying issues that may not have been properly addressed.

8. Are there any preventive maintenance tips to avoid encountering the P0742 code related to Torque Converter Clutch Stuck On in my Jeep?

Regularly checking and maintaining proper transmission fluid levels, addressing leaks promptly, and following the manufacturer's recommended service intervals can help prevent issues leading to this trouble code.

9. Can a DIY enthusiast with basic mechanical skills tackle the repair of the P0742 code indicating Torque Converter Clutch Stuck On in a Jeep?

Depending on the specific cause of the issue, some repairs related to this code may be within reach for DIY enthusiasts. However, complex transmission work should be left to experienced professionals.

10. How crucial is it to address the OBDII code P0742 indicating Torque Converter Clutch Stuck On in a timely manner for my Jeep's overall performance and longevity?

Promptly addressing this code is vital to prevent further damage to the transmission, ensure optimal vehicle performance, and extend the longevity of your Jeep's drivetrain components.