What does code P28DF mean?

Q: What does code P28DF mean?

Clutch B Pressure Sensor Circuit Range/Performance. P28DF indicates that the powertrain control module has detected an out-of-range or performance fault in the electrical circuit for the Clutch B pressure sensor, which monitors hydraulic pressure in a dual-clutch or automated manual transmission. The computer compares the sensor signal against expected values under specific operating conditions and sets the code when the voltage or pressure reading falls outside the valid range or does not change as expected.

DTC codes / P28xx · Transmission / P28DF

P28DFClutch B Pressure Sensor Circuit Range/Performance

P28DF indicates that the powertrain control module has detected an out-of-range or performance fault in the electrical circuit for the Clutch B pressure sensor, which monitors hydraulic pressure in a dual-clutch or automated manual transmission. The computer compares the sensor signal against expected values under specific operating conditions and sets the code when the voltage or pressure reading falls outside the valid range or does not change as expected.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.