Code Definition

P0814 — Transmission Range Display Circuit

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

About P0814

P0814 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 P0814 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

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 P0814 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

Fault code P0814 is set when the vehicle's powertrain control module (PCM) or transmission control module (TCM) detects a malfunction within the transmission range display circuit. This circuit is responsible for providing information to the driver about the current gear selection or transmission range through the vehicle's display system. A malfunction in this circuit can lead to incorrect, erratic, or no display of the transmission gear position, affecting the driver's ability to determine the selected gear.

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