What does code P21E6 mean?

Q: What does code P21E6 mean?

Cylinder 6 Injector B Circuit Low. P21E6 indicates that the powertrain control module has detected an abnormally low voltage or current on the control circuit for cylinder 6 injector B, which is the secondary injector on that cylinder in engines equipped with dual-injector or staged injection systems. The computer monitors the circuit and flags this code when the signal falls below the expected threshold, meaning the injector may not be firing or the wiring has a short to ground or an open.

DTC codes / P21xx · Fuel and air metering / P21E6

P21E6Cylinder 6 Injector B Circuit Low

P21E6 indicates that the powertrain control module has detected an abnormally low voltage or current on the control circuit for cylinder 6 injector B, which is the secondary injector on that cylinder in engines equipped with dual-injector or staged injection systems. The computer monitors the circuit and flags this code when the signal falls below the expected threshold, meaning the injector may not be firing or the wiring has a short to ground or an open.

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.