What does code P2D1B mean?

Q: What does code P2D1B mean?

Exhaust Flow Control Valve C Position Not Learned. P2D1B indicates that the powertrain control module (PCM) has not successfully completed the learning procedure for the exhaust flow control valve in position C. The PCM expects to see a specific feedback signal change when it commands the valve through its range, but the signal does not match the stored profile, so the learn routine aborts and the code is set.

DTC codes / P2Dxx · Hybrid propulsion / P2D1B

P2D1BExhaust Flow Control Valve C Position Not Learned

P2D1B indicates that the powertrain control module (PCM) has not successfully completed the learning procedure for the exhaust flow control valve in position C. The PCM expects to see a specific feedback signal change when it commands the valve through its range, but the signal does not match the stored profile, so the learn routine aborts and the code is set.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.