Code Definition

P081C — Park input circuit

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

About P081C

P081C 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 P081C is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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 P081C 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 P081C fault code is set when the Engine Control Module (ECM) or Transmission Control Module (TCM) detects a malfunction or irregularity in the park input circuit. This circuit is responsible for relaying the park position signal from the transmission's shift position sensor or switch to the ECM/TCM. It confirms whether the vehicle's transmission is in the park position. An issue in this circuit could be due to electrical problems like a short circuit, an open circuit, or a fault in the sensor or switch that detects the park position.

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