Code Definition

P0862 — Gear Shift Module Communication signal high - Circuit A

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0862

P0862 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0862 is stored, the module has detected a signal or supply voltage higher than the expected operating range.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0862 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0862 fault code is set when the vehicle's control module identifies a high voltage condition in the communication signal of the Gear Shift Module, specifically in Circuit A. This indicates that the voltage level in this portion of the gear shift module's communication circuit is exceeding the expected range, possibly due to an electrical issue such as a short to power. High voltage in this circuit can disrupt the normal communication and functioning of the gear shift module, potentially impacting the vehicle's gear selection and transmission operations.

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