P0863
TCM Communication Circuit
P0863 is an OBD-II diagnostic trouble code meaning: TCM Communication Circuit. Common causes: open or short circuit in tcm communication circuit, poor contact in tcm connectors. Estimated repair cost: $56–278.
Symptoms
- Incorrect gear shifting
- The gearbox goes into emergency mode
- Check Engine Light Is On
- Reduced engine power
- Other related trouble codes appear
Causes
- Open or short circuit in TCM communication circuit
- Poor contact in TCM connectors
- TCM module malfunction
- TCM power or ground problems
- Malfunction of other associated electronic components
How to Fix
- Check the integrity of the wires in the TCM communication circuit
- Inspect and clean contacts in TCM connectors
- Check TCM power and ground
- Scan other electronic components for errors
- Replace TCM if necessary
Related codes
Error P0863 by Vehicle Brand
FAQ
What does the P0863 code mean?
P0863 is an OBD-II diagnostic trouble code that indicates: TCM Communication Circuit
What causes a P0863 error code?
The most common causes of P0863 include: Open or short circuit in TCM communication circuit; Poor contact in TCM connectors; TCM module malfunction; TCM power or ground problems.
How do I fix a P0863 diagnostic trouble code?
To fix P0863: Check the integrity of the wires in the TCM communication circuit. Inspect and clean contacts in TCM connectors. Check TCM power and ground. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0863?
Limited driving only, diagnose soon
How much does it cost to fix P0863?
The estimated repair cost for P0863 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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