What does code P28BD mean?

Q: What does code P28BD mean?

Cylinder 12 Ion Current Sense Circuit Range/Performance. P28BD indicates that the powertrain control module (PCM) has detected an out-of-range or erratic signal from the ion current sense circuit for cylinder 12, which is used to monitor combustion quality and detect misfire. The PCM compares the ion current feedback against expected values and sets this code when the signal falls outside the normal performance window.

DTC codes / P28xx · Transmission / P28BD

P28BDCylinder 12 Ion Current Sense Circuit Range/Performance

P28BD indicates that the powertrain control module (PCM) has detected an out-of-range or erratic signal from the ion current sense circuit for cylinder 12, which is used to monitor combustion quality and detect misfire. The PCM compares the ion current feedback against expected values and sets this code when the signal falls outside the normal performance window.

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.