P0860
Gear Shift Control Module A Communication Circuit
P0860 is an OBD-II diagnostic trouble code meaning: Gear Shift Control Module A Communication Circuit. Common causes: broken or damaged wires in the communication circuit, poor contact in the control module connectors. Estimated repair cost: $56–222.
Symptoms
- Gear shifting problems
- Check Engine light comes on
- The car goes into emergency mode
- Reduced engine power
- Unstable gearbox operation
Causes
- Broken or damaged wires in the communication circuit
- Poor contact in the control module connectors
- Shift Control Module (TCM) malfunction
- Problems with the engine control unit (ECU)
- Short circuit in the circuit
How to Fix
- Check the integrity of wires and connectors in the communication circuit
- Clean TCM and ECU connector contacts
- Check TCM power and ground
- Scan the TCM for additional errors
- Replace TCM if necessary
Related codes
Error P0860 by Vehicle Brand
FAQ
What does the P0860 code mean?
P0860 is an OBD-II diagnostic trouble code that indicates: Gear Shift Control Module A Communication Circuit
What causes a P0860 error code?
The most common causes of P0860 include: Broken or damaged wires in the communication circuit; Poor contact in the control module connectors; Shift Control Module (TCM) malfunction; Problems with the engine control unit (ECU).
How do I fix a P0860 diagnostic trouble code?
To fix P0860: Check the integrity of wires and connectors in the communication circuit. Clean TCM and ECU connector contacts. Check TCM power and ground. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0860?
Do not drive — repair immediately
How much does it cost to fix P0860?
The estimated repair cost for P0860 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
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