Fault Code P0865
Code meaning, symptoms, possible causes, part number, and estimated cost.
P0865
Transmission Control Module (TCM) Communication Circuit Low
Code P0865 indicates a lower than expected voltage in the Transmission Control Module (TCM) communication circuit. This could be caused by a short to ground or severely damaged wiring.
Part Details
Part Name
Transmission Control Module (TCM)
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪1000 - ₪3000
Engine Location
Transmission/Engine bay
Symptoms
- Vehicle unable to start
- Gears not engaging
- Check Engine Light on
- Limp mode activation
Possible Causes
- 1Faulty TCM module
- 2Short to ground in CAN Bus circuit
- 3Faulty or disconnected wiring
- 4Engine Control Module (ECM) issue
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