AutoCodes – Generic – P1742

P1742 Code - Torque Converter Clutch Solenoid Failed On Conditions

Quick Answer

With the engine running in gear at cruise speed and the Powertrain Control Module (PCM) receives a signal that the Torque Converter Clutch (TCC) failed ON. Common causes include Faulty Torque Converter Clutch Solenoid, Torque Converter Clutch Solenoid harness is open or shorted, Torque Converter Clutch Solenoid circuit poor electrical connection. 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: P1742 indicates Torque Converter Clutch Solenoid Failed On Conditions.
Common causes: Common causes include Faulty Torque Converter Clutch Solenoid, Torque Converter Clutch Solenoid harness is open or shorted, Torque Converter Clutch Solenoid circuit poor electrical connection.
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 22,851

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 Sep 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1742 Description

With the engine running in gear at cruise speed and the Powertrain Control Module (PCM) receives a signal that the Torque Converter Clutch (TCC) failed ON.

OBDII Code P1742 - Torque Converter Clutch Solenoid Failed On Conditions - AutoCodes.com — P1742 Code - Torque Converter Clutch Solenoid Failed On Conditions

What does this mean?

What are the Possible Causes of the DTC P1742?

Faulty Torque Converter Clutch Solenoid
Torque Converter Clutch Solenoid harness is open or shorted
Torque Converter Clutch Solenoid circuit poor electrical connection

How to Fix the DTC P1742?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1742 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.

Need more information about the P1742 code?

Need more information on how to fix the P1742 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1742 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1742 Ford — Torque Converter Clutch Solenoid Failed On Conditions
P1742 Hyundai — Position 3 Short To Ground
P1742 Mazda — Torque Converter Clutch Solenoid Failed On Conditions

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 P1742 Code

1. What are the common symptoms of OBDII code P1742 (Torque Converter Clutch Solenoid Failed On Conditions)?

- Common symptoms include harsh shifting, engine stalling at stops, decreased fuel efficiency, and a noticeable drop in overall performance.

2. What can cause the Torque Converter Clutch Solenoid to fail and trigger code P1742?

- The most common causes of this issue are a faulty solenoid, low transmission fluid levels, electrical issues, or a damaged torque converter.

3. How serious is the P1742 code related to the Torque Converter Clutch Solenoid failure?

- Ignoring this code can lead to further damage to the transmission system and potentially result in expensive repairs. It is advisable to address it promptly.

4. Can I continue driving my vehicle with code P1742 present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to more severe transmission problems and potential safety hazards.

5. How can I diagnose the cause of the Torque Converter Clutch Solenoid failure?

- To diagnose the issue, a professional mechanic can use a scan tool to read the stored trouble codes, inspect the transmission fluid level and condition, and perform a thorough visual inspection.

6. Is it possible to repair the Torque Converter Clutch Solenoid myself?

- Repairing or replacing the solenoid requires technical knowledge and experience working with transmission systems. It is recommended to seek the assistance of a qualified mechanic.

7. What are some tips for preventing issues with the Torque Converter Clutch Solenoid?

- Regularly checking and maintaining proper transmission fluid levels, having the transmission serviced at recommended intervals, and addressing any unusual symptoms promptly can help prevent solenoid failures.

8. How much does it typically cost to repair the Torque Converter Clutch Solenoid issue causing code P1742?

- The cost of repair can vary depending on the extent of the damage, labor rates, and the need for parts replacement. It is advisable to obtain quotes from different repair shops.

9. Can a faulty Torque Converter Clutch Solenoid affect the overall performance of the vehicle?

- Yes, a malfunctioning solenoid can cause poor acceleration, erratic shifting, and reduced fuel efficiency, impacting the overall performance of the vehicle.

10. Will resetting the OBDII code P1742 make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the fault is not addressed, the code is likely to reappear. It is essential to diagnose and fix the root cause.