What does code P01B1 mean?

Q: What does code P01B1 mean?

Alternative Fuel Tank A Level Sensor Circuit Low. P01B1 means the powertrain control module (PCM) has detected a low-voltage signal on the fuel level sensor circuit for alternative fuel tank A, which is the tank that stores a fuel other than gasoline such as compressed natural gas or liquefied petroleum gas. The PCM expects the sensor to report a voltage within a calibrated range, and a sustained low reading tells the module the circuit is grounded, shorted, or the sensor has failed.

DTC codes / P01xx · Fuel and air metering / P01B1

P01B1Alternative Fuel Tank A Level Sensor Circuit Low

P01B1 means the powertrain control module (PCM) has detected a low-voltage signal on the fuel level sensor circuit for alternative fuel tank A, which is the tank that stores a fuel other than gasoline such as compressed natural gas or liquefied petroleum gas. The PCM expects the sensor to report a voltage within a calibrated range, and a sustained low reading tells the module the circuit is grounded, shorted, or the sensor has failed.

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.