← Back to Search Severity: Medium

P0978

P0978: Transmission Advanced System - Torque Converter Clutch Solenoid Circuit Malfunction

Fix Cost

$200 - $800

Parts & Labor

Difficulty

3/5

Moderate

1-2 hours

DIY Possible?

❌ No

Pro recommended

📖 What Does P0978 Mean?

The transmission control module (TCM) has detected a malfunction in the torque converter clutch solenoid circuit, which may cause issues with transmission shifting and performance.

⚠️

Symptoms

• Transmission hesitation
• slipping
• or failure to engage gears
• unusual noises
• or the check engine light is illuminated.

🔍

Common Causes

• Faulty torque converter clutch solenoid
• wiring issues
• or a problem with the transmission control module.

Fix Guide

🛠️

Possible Solutions

1. Clear any trouble codes and test drive the vehicle to verify the issue. 2. Inspect the torque converter clutch solenoid for signs of damage or corrosion. 3. Check the wiring harness for any damage or pinched wires. 4. If necessary, replace the torque converter clutch solenoid or the transmission control module.

🚗

Fixing this on your car?

Get a vehicle-specific repair guide with exact parts, oil specs, and torque settings for your make and model.

Find My Car's Guide

🚙 Get Vehicle-Specific Fix Guide

Select your vehicle to see a customized repair guide with exact parts and specifications:

2021 Honda Passport 2014 Nissan Sentra 2017 Toyota Camry 2019 Ford F-150 2020 Chevrolet Silverado 2018 BMW X5

Don't see your vehicle? Browse all makes & models →

❓ Common Questions About P0978

Can I drive with code P0978?

You can drive for a short time, but should address code P0978 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix P0978?

The estimated repair cost for code P0978 is between $200 and $800. This includes parts and labor for most makes and models.

Is this code easy to fix myself?

This repair is considered moderate. It may require specialized tools or significant disassembly. Professional help is recommended if you aren't an experienced DIYer.