DTC codes / P01xx · Fuel and air metering / P01C6
P01C6 indicates that the powertrain control module has detected an abnormally high voltage on the signal circuit for Fuel Pressure Sensor A, which typically measures fuel rail pressure on a gasoline direct-injection engine. The sensor's output voltage is above the expected range for the current operating conditions, so the computer flags the circuit as high.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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