DTC codes / P01xx · Fuel and air metering / P01A2
P01A2 is a generic OBD-II code indicating that the powertrain control module (PCM) has detected an intermittent or erratic signal from the pressure sensor in the alternative fuel tank 'A' circuit. The PCM monitors the sensor's voltage or pressure reading and flags the code when the signal jumps, drops out, or behaves unpredictably beyond a calibrated threshold.
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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