What does code P2A66 mean?

Q: What does code P2A66 mean?

Alternative Fuel Tank C Level Sensor Circuit Low. P2A66 indicates that the powertrain control module has detected a low voltage signal from the alternative fuel tank C level sensor circuit, which typically monitors the fuel level in a secondary or auxiliary tank. The computer sets this code when the sensor signal falls below the expected minimum threshold for a calibrated period, indicating a short to ground, an open circuit, or a faulty sensor.

DTC codes / P2Axx · Hybrid propulsion / P2A66

P2A66Alternative Fuel Tank C Level Sensor Circuit Low

P2A66 indicates that the powertrain control module has detected a low voltage signal from the alternative fuel tank C level sensor circuit, which typically monitors the fuel level in a secondary or auxiliary tank. The computer sets this code when the sensor signal falls below the expected minimum threshold for a calibrated period, indicating a short to ground, an open circuit, or a faulty sensor.

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.