P0864
TCM Communication Circuit Range/Performance
P0864 is an OBD-II diagnostic trouble code meaning: TCM Communication Circuit Range/Performance. Common causes: damaged tcm wiring harness, tcm module malfunction. Estimated repair cost: $56–278.
Symptoms
- Incorrect gear shifting
- The gearbox goes into emergency mode
- Check Engine light comes on
- Reduced engine power
- Jerks when shifting gears
Causes
- Damaged TCM wiring harness
- TCM module malfunction
- Poor contact in TCM connectors
- TCM power problems
- Engine control unit (ECU) malfunction
How to Fix
- Check TCM wiring harness integrity
- Inspect TCM connectors for oxidation or damage.
- Check TCM power and ground
- Scan the TCM for additional error codes
- Replace TCM if necessary
Related codes
Error P0864 by Vehicle Brand
FAQ
What does the P0864 code mean?
P0864 is an OBD-II diagnostic trouble code that indicates: TCM Communication Circuit Range/Performance
What causes a P0864 error code?
The most common causes of P0864 include: Damaged TCM wiring harness; TCM module malfunction; Poor contact in TCM connectors; TCM power problems.
How do I fix a P0864 diagnostic trouble code?
To fix P0864: Check TCM wiring harness integrity. Inspect TCM connectors for oxidation or damage.. Check TCM power and ground. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0864?
Limited driving only, diagnose soon
How much does it cost to fix P0864?
The estimated repair cost for P0864 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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