P0862: Gear Shift Control Module A Communication Circuit High
What to do
The selector may be ignored. If this is the only communication fault stored, the problem is likely in the selector's own wiring rather than the vehicle's network — a smaller job.
What this code means
The gear shift module's communication circuit is held high — a short to supply, or an open that leaves the line idle at its resting voltage. An open affects only the module beyond the break, which is the useful distinction from P0861: a fault confined to the selector points at its own wiring, while one that silences several modules points at the shared bus.
Likely causes
Start here
- Open circuit in module wiring · moderate
- Corroded or loose connector · easy
Less common
- Faulty gear shift module · specialist
- Wiring shorted to voltage · moderate
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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