OBD-II code C0054 indicates that the steering wheel position sensor's 'C' signal circuit is out of range or experiencing an electrical fault. This sensor provides the steering angle input used by electric power steering, stability control, and related systems.
The sensor itself may have an internal open, short, or degraded output, causing the C signal to be invalid.
Chafed, corroded, or broken wires, or a loose/connector with poor contact can interrupt the signal or introduce noise.
The clock spring carries the sensor's signal through the steering column; wear or breakage can loss of the C signal.
Corroded ground straps or insufficient voltage at the sensor can produce erroneous readings.
Although uncommon, a fault in the control module's input circuitry for the sensor can trigger the code; this is considered only after sensor and wiring are verified good.
Rare cases of electromagnetic interference or a temporary module software issue can set the code without a hardware fault.
No. The powertrain control module is rarely at fault for this code. A failed sensor, wiring issue, or clock spring is far more likely; PCM replacement should be considered only after those components are verified functional.
Driving is possible but may result in reduced or intermittent power steering assist and disabled stability‑control functions, which can affect handling and safety. It is advisable to repair the fault promptly.
Clearing the code only turns off the warning light; if the underlying fault remains, the code will return after the next drive cycle.