What does code P28DD mean?

Q: What does code P28DD mean?

Clutch B Pressure Sensor Circuit Low. P28DD indicates that the powertrain control module (PCM) has detected a low voltage signal from the Clutch B pressure sensor circuit, which typically monitors hydraulic pressure in a dual-clutch or automated manual transmission. The PCM expects a voltage within a calibrated range, and a sustained low reading tells it the sensor, its wiring, or its reference circuit is not reporting correctly.

DTC codes / P28xx · Transmission / P28DD

P28DDClutch B Pressure Sensor Circuit Low

P28DD indicates that the powertrain control module (PCM) has detected a low voltage signal from the Clutch B pressure sensor circuit, which typically monitors hydraulic pressure in a dual-clutch or automated manual transmission. The PCM expects a voltage within a calibrated range, and a sustained low reading tells it the sensor, its wiring, or its reference circuit is not reporting correctly.

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.