What does code P21E5 mean?

Q: What does code P21E5 mean?

Cylinder 5 Injector B Circuit High. P21E5 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for cylinder 5 injector B, which usually means the circuit is open, shorted to power, or the injector's internal coil has failed. The PCM commands a ground pulse to fire the injector, and when it sees voltage above the expected threshold on the driver's feedback line, it sets this code and may disable that injector to protect the driver circuit.

DTC codes / P21xx · Fuel and air metering / P21E5

P21E5Cylinder 5 Injector B Circuit High

P21E5 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for cylinder 5 injector B, which usually means the circuit is open, shorted to power, or the injector's internal coil has failed. The PCM commands a ground pulse to fire the injector, and when it sees voltage above the expected threshold on the driver's feedback line, it sets this code and may disable that injector to protect the driver circuit.

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.