What does code P01A5 mean?

Q: What does code P01A5 mean?

Alternative Fuel Rail Pressure Sensor Circuit Low. P01A5 indicates that the powertrain control module (PCM) has detected a low-voltage signal from the alternative fuel rail pressure sensor circuit, which monitors the pressure of the alternative fuel (such as compressed natural gas or ethanol) in the fuel rail. The PCM compares the sensor's output to expected values and sets this code when the signal falls below the calibrated minimum for a specified time, indicating a short to ground, an open circuit, or a faulty sensor.

DTC codes / P01xx · Fuel and air metering / P01A5

P01A5Alternative Fuel Rail Pressure Sensor Circuit Low

P01A5 indicates that the powertrain control module (PCM) has detected a low-voltage signal from the alternative fuel rail pressure sensor circuit, which monitors the pressure of the alternative fuel (such as compressed natural gas or ethanol) in the fuel rail. The PCM compares the sensor's output to expected values and sets this code when the signal falls below the calibrated minimum for a specified time, indicating a short to ground, an open circuit, or a faulty sensor.

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.