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P0742 Mitsubishi Code - Torque Converter Clutch System Malfunction

Quick Answer

The P0742 code in a Mitsubishi indicates a malfunction in the Torque Converter Clutch (TCC) system. Common causes include Faulty torque converter clutch solenoid, Low transmission fluid levels or dirty fluid, Wiring or electrical issues in the TCC circuit. 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 Mitsubishi indicates Torque Converter Clutch System Malfunction.
Common causes
Common causes include Faulty torque converter clutch solenoid, Low transmission fluid levels or dirty fluid, Wiring or electrical issues in the TCC circuit.
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 12, 2024
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Code P0742 Mitsubishi Description

The P0742 code in a Mitsubishi indicates a malfunction in the Torque Converter Clutch (TCC) system. The torque converter is a critical component in a vehicle's automatic transmission system that transfers power from the engine to the transmission. The Torque Converter Clutch is responsible for locking the torque converter when the vehicle reaches a certain speed to improve fuel efficiency and reduce slippage. When the TCC system malfunctions, it can lead to various issues that affect the vehicle's performance and fuel efficiency.

OBDII Code P0742 Mitsubishi - Torque Converter Clutch System Malfunction
P0742 Mitsubishi Code - Torque Converter Clutch System Malfunction

Common Causes of P0742 Mitsubishi

  1. Faulty torque converter clutch solenoid
  2. Low transmission fluid levels or dirty fluid
  3. Wiring or electrical issues in the TCC circuit
  4. Mechanical problems in the torque converter
  5. Internal transmission damage or wear

Symptoms of P0742 Mitsubishi

  1. Check Engine Light illuminated on the dashboard
  2. Transmission slipping or delayed engagement
  3. Decreased fuel efficiency
  4. Rough shifting or difficulty changing gears
  5. Vehicle stalling at low speeds

How to Fix P0742 Mitsubishi

  1. Diagnose the specific cause of the issue by using a scan tool to read the code and inspecting the TCC system.
  2. Check the transmission fluid level and condition. If low or dirty, perform a transmission fluid flush and refill.
  3. Test the torque converter clutch solenoid and replace if faulty.
  4. Inspect the wiring and electrical connections in the TCC circuit for any damage or corrosion.
  5. If necessary, replace the torque converter or perform any other repairs needed to fix the TCC system malfunction.

Cost to Fix P0742 Mitsubishi

The cost of repairing a P0742 code in a Mitsubishi can vary depending on the specific cause of the issue and the extent of the damage. Generally, the repair costs for this type of problem can range from $300 to $800, including parts and labor. However, the final cost can be higher if more extensive repairs are needed. It's essential to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle. Keep in mind that labor rates at auto repair shops can vary, so it's advisable to check local rates for a more precise cost estimate.

What does this mean?

Tech Notes for P0742 Mitsubishi

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.

When is the Code Detected?

The Transmission Control Module (TCM) has detected slippage on the Torque Converter Clutch (TCC) during a period when the converter is commanded off

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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 Mitsubishi Code

1. What are the common symptoms of OBDII code P0742 in a Mitsubishi related to the torque converter clutch system malfunction?

Symptoms may include harsh shifting, decreased fuel efficiency, slipping transmission, and the illumination of the Check Engine Light.

2. What are the potential causes of OBDII code P0742 in a Mitsubishi?

Common causes include a faulty torque converter clutch solenoid, low transmission fluid levels, internal transmission issues, or a malfunctioning torque converter itself.

3. How can I diagnose the OBDII code P0742 in my Mitsubishi?

Diagnosis typically involves using a scan tool to retrieve the code, inspecting the transmission fluid level and condition, and performing a thorough visual inspection of the transmission components.

4. What are the repair options for resolving OBDII code P0742 in a Mitsubishi?

Repair options may include replacing the torque converter clutch solenoid, addressing any transmission fluid leaks, performing a transmission flush, or replacing the torque converter if necessary.

5. Can driving with OBDII code P0742 in a Mitsubishi cause further damage to the vehicle?

Continuing to drive with this code may lead to further damage to the transmission components, potentially resulting in more extensive and costly repairs down the line.

6. Are there any DIY tips for addressing OBDII code P0742 in a Mitsubishi?

While some basic checks like inspecting the transmission fluid level can be done by DIY enthusiasts, diagnosing and repairing the underlying cause of the code typically requires professional expertise.

7. How much does it cost to repair OBDII code P0742 in a Mitsubishi?

Repair costs can vary depending on the specific cause of the code, the labor rates in your area, and whether any transmission components need to be replaced. It's advisable to obtain quotes from reputable mechanics.

8. Is it safe to drive my Mitsubishi with OBDII code P0742?

It is not recommended to drive the vehicle extensively with this code present, as it can lead to transmission issues and potential breakdowns. It's best to address the problem promptly.

9. Can resetting the Check Engine Light resolve OBDII code P0742 in a Mitsubishi?

Resetting the light may temporarily turn it off, but if the underlying issue causing the code is not addressed, the light is likely to come back on once the problem is detected again.

10. How long does it typically take to repair OBDII code P0742 in a Mitsubishi?

The repair time can vary based on the specific cause of the code and the extent of the repairs needed. It's best to consult with a professional technician for a more accurate estimate based on your vehicle's condition.

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