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DTC codes / P01xx · Fuel and air metering / P01A2

P01A2Alternative Fuel Tank A Pressure Sensor Circuit Intermittent/Erratic

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.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaFuel and air metering

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage