Fault Code P0631
Code meaning, symptoms, possible causes, part number, and estimated cost.
P0631
ECM/PCM Mismatch - Transmission Control Module (TCM)
Code P0631 indicates a mismatch or incorrect communication between the Engine Control Module (ECM)/Powertrain Control Module (PCM) and the Transmission Control Module (TCM).
Part Details
Part Name
Engine Control Module (ECM) / 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
₪1200 - ₪4500
Engine Location
Engine compartment/Transmission
Symptoms
- Check Engine Light on
- Hard or erratic shifting
- Poor engine performance
- Engine enters limp mode
Possible Causes
- 1Incorrect software update
- 2ECM or TCM malfunction
- 3Wiring or connector issues between units
- 4Incompatible control unit installed
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