What does code P2D8B mean?

Q: What does code P2D8B mean?

Fan 2 Control Module Performance. P2D8B indicates that the powertrain control module (PCM) has detected a performance fault in the control circuit for Fan 2, which is the second cooling fan or the high-speed fan relay circuit on vehicles with dual fan systems. The PCM commands the fan on and monitors the circuit for expected voltage or current feedback, and when the response does not match the commanded state within a calibrated time, it stores this code and may illuminate the check engine light.

DTC codes / P2Dxx · Hybrid propulsion / P2D8B

P2D8BFan 2 Control Module Performance

P2D8B indicates that the powertrain control module (PCM) has detected a performance fault in the control circuit for Fan 2, which is the second cooling fan or the high-speed fan relay circuit on vehicles with dual fan systems. The PCM commands the fan on and monitors the circuit for expected voltage or current feedback, and when the response does not match the commanded state within a calibrated time, it stores this code and may illuminate the check engine light.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

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