What does code P21BE mean?

Q: What does code P21BE mean?

Cold Start Cylinder 9 Injection Timing. P21BE indicates that the engine control module (ECM) has detected an injection timing fault specifically for cylinder 9 during a cold start condition. The ECM monitors the crankshaft position and injection events, and when the expected timing correlation for cylinder 9 falls outside the calibrated window while the engine is cold, it sets this code.

DTC codes / P21xx · Fuel and air metering / P21BE

P21BECold Start Cylinder 9 Injection Timing

P21BE indicates that the engine control module (ECM) has detected an injection timing fault specifically for cylinder 9 during a cold start condition. The ECM monitors the crankshaft position and injection events, and when the expected timing correlation for cylinder 9 falls outside the calibrated window while the engine is cold, it sets this code.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaFuel and air metering

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