What does code P21BA mean?

Q: What does code P21BA mean?

Cold Start Cylinder 5 Injection Timing. P21BA indicates that the powertrain control module has detected an out-of-range condition in the cold-start injection timing strategy specifically for cylinder 5. The computer compares expected injection timing during a cold start against actual feedback and sets the code when the deviation exceeds calibrated limits, often due to mechanical or electrical faults in the cylinder 5 injector circuit or related components.

DTC codes / P21xx · Fuel and air metering / P21BA

P21BACold Start Cylinder 5 Injection Timing

P21BA indicates that the powertrain control module has detected an out-of-range condition in the cold-start injection timing strategy specifically for cylinder 5. The computer compares expected injection timing during a cold start against actual feedback and sets the code when the deviation exceeds calibrated limits, often due to mechanical or electrical faults in the cylinder 5 injector circuit or related components.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

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.