What does code P28F1 mean?

Q: What does code P28F1 mean?

Engine Disconnect Clutch Pressure Sensor Circuit. P28F1 indicates that the powertrain control module (PCM) has detected an abnormal condition in the electrical circuit of the engine disconnect clutch pressure sensor, which monitors hydraulic pressure in the clutch that couples the engine to the hybrid drive system. The PCM compares the sensor signal against expected values and sets this code when the voltage or pressure reading falls outside the valid range for a calibrated time.

DTC codes / P28xx · Transmission / P28F1

P28F1Engine Disconnect Clutch Pressure Sensor Circuit

P28F1 indicates that the powertrain control module (PCM) has detected an abnormal condition in the electrical circuit of the engine disconnect clutch pressure sensor, which monitors hydraulic pressure in the clutch that couples the engine to the hybrid drive system. The PCM compares the sensor signal against expected values and sets this code when the voltage or pressure reading falls outside the valid range for a calibrated time.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaTransmission

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