What does code P01A1 mean?

Q: What does code P01A1 mean?

Alternative Fuel Tank A Pressure Sensor Circuit High. P01A1 indicates that the powertrain control module (PCM) has detected a voltage signal from the alternative fuel tank A pressure sensor that is higher than the expected range for the current operating conditions. This typically means the sensor circuit is open, shorted to voltage, or the sensor itself has failed, causing the PCM to see an abnormally high pressure reading.

DTC codes / P01xx · Fuel and air metering / P01A1

P01A1Alternative Fuel Tank A Pressure Sensor Circuit High

P01A1 indicates that the powertrain control module (PCM) has detected a voltage signal from the alternative fuel tank A pressure sensor that is higher than the expected range for the current operating conditions. This typically means the sensor circuit is open, shorted to voltage, or the sensor itself has failed, causing the PCM to see an abnormally high pressure reading.

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.