P0702
Transmission Control System Electrical
P0702 is an OBD-II diagnostic trouble code meaning: Transmission Control System Electrical. Common causes: damaged tcm wiring harness, oxidation or damage to tcm connectors. Estimated repair cost: $56–278.
Symptoms
- Incorrect gear shifting
- Transmission transition to emergency mode
- Check Engine light comes on
- Loss of power or jerking when shifting
Causes
- Damaged TCM wiring harness
- Oxidation or damage to TCM connectors
- Transmission control module (TCM) malfunction
- TCM power or ground problems
- Short circuit in control circuit
How to Fix
- Check the condition of the TCM wiring harness and connectors
- Check TCM supply voltage and ground
- Scan TCM for additional errors
- Replace TCM if necessary
- Clear error codes and test drive
Related codes
Error P0702 by Vehicle Brand
FAQ
What does the P0702 code mean?
P0702 is an OBD-II diagnostic trouble code that indicates: Transmission Control System Electrical
What causes a P0702 error code?
The most common causes of P0702 include: Damaged TCM wiring harness; Oxidation or damage to TCM connectors; Transmission control module (TCM) malfunction; TCM power or ground problems.
How do I fix a P0702 diagnostic trouble code?
To fix P0702: Check the condition of the TCM wiring harness and connectors. Check TCM supply voltage and ground. Scan TCM for additional errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0702?
Limited driving only, diagnose soon
How much does it cost to fix P0702?
The estimated repair cost for P0702 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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