Code Definition

P0902 — Clutch Actuator Circuit Low

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

About P0902

P0902 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 P0902 is stored, the module has detected a signal or supply voltage lower 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 P0902 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 P0902 fault code is set when the transmission control module (TCM) or engine control module (ECM) detects a low voltage condition in the clutch actuator circuit. This code indicates that the voltage in the circuit controlling the clutch actuator is below the expected range, suggesting an electrical problem. The clutch actuator plays a critical role in vehicles with automated manual transmissions or certain types of automatic transmissions, as it is responsible for the mechanical operation of the clutch. A low voltage condition in this circuit can lead to inadequate operation of the clutch ...

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