What does code P28F4 mean?

Q: What does code P28F4 mean?

Engine Disconnect Clutch Pressure Sensor Circuit High. This code indicates that the powertrain control module has detected an abnormally high voltage signal from the engine disconnect clutch pressure sensor circuit, which typically means the sensor is reporting pressure beyond its expected range or the circuit is shorted to voltage. The engine disconnect clutch is used in hybrid and some automatic transmission systems to couple or decouple the engine from the driveline, and the pressure sensor monitors hydraulic pressure in that clutch circuit.

DTC codes / P28xx · Transmission / P28F4

P28F4Engine Disconnect Clutch Pressure Sensor Circuit High

This code indicates that the powertrain control module has detected an abnormally high voltage signal from the engine disconnect clutch pressure sensor circuit, which typically means the sensor is reporting pressure beyond its expected range or the circuit is shorted to voltage. The engine disconnect clutch is used in hybrid and some automatic transmission systems to couple or decouple the engine from the driveline, and the pressure sensor monitors hydraulic pressure in that clutch circuit.

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.