Code Definition

P0335 — Crankshaft Position Sensor A Circuit Malfunction

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

About P0335

P0335 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 P0335 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 P0335 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 Engine Control Module (ECM) sets this code when it detects an issue with the crankshaft position sensor (CKP) circuit. This can occur if the sensor signal is missing, erratic, or out of the expected range. The ECM relies on the CKP sensor to monitor crankshaft position and speed, which is critical for ignition timing and fuel injection synchronisation. A malfunction can result in poor engine performance, misfires, or a no-start condition.

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