What does code P2A4B mean?

Q: What does code P2A4B mean?

Alternative Fuel Temperature Sensor Circuit. P2A4B indicates that the powertrain control module (PCM) has detected an abnormal signal from the alternative fuel temperature sensor circuit, which monitors the temperature of fuels such as compressed natural gas (CNG), liquefied petroleum gas (LPG), or ethanol blends. The PCM compares the sensor's voltage or resistance against expected values and sets this code when the reading falls outside the calibrated range or the circuit fails a rationality check.

DTC codes / P2Axx · Hybrid propulsion / P2A4B

P2A4BAlternative Fuel Temperature Sensor Circuit

P2A4B indicates that the powertrain control module (PCM) has detected an abnormal signal from the alternative fuel temperature sensor circuit, which monitors the temperature of fuels such as compressed natural gas (CNG), liquefied petroleum gas (LPG), or ethanol blends. The PCM compares the sensor's voltage or resistance against expected values and sets this code when the reading falls outside the calibrated range or the circuit fails a rationality check.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

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