Code Definition

P0809 — Clutch Position Sensor Circuit Intermittent Malfunction

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

About P0809

P0809 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 P0809 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

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 P0809 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 P0809 is activated when the vehicle's powertrain control module (PCM) or transmission control module (TCM) detects intermittent signals or connectivity issues in the clutch position sensor circuit. This typically points to an erratic or unstable signal from the clutch position sensor, which is crucial in vehicles with manual or automated manual transmissions for monitoring the position of the clutch pedal. The intermittent nature of the malfunction suggests issues like loose connections, intermittent shorts, or fluctuating sensor output.

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