What does code P21E7 mean?

Q: What does code P21E7 mean?

Cylinder 6 Injector B Circuit High. P21E7 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for cylinder 6 injector B, which is typically the second injector in a multi-injector arrangement for that cylinder. The PCM monitors the circuit and sets this code when the voltage exceeds the expected range, often indicating a short to power, an open circuit, or a faulty injector.

DTC codes / P21xx · Fuel and air metering / P21E7

P21E7Cylinder 6 Injector B Circuit High

P21E7 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for cylinder 6 injector B, which is typically the second injector in a multi-injector arrangement for that cylinder. The PCM monitors the circuit and sets this code when the voltage exceeds the expected range, often indicating a short to power, an open circuit, or a faulty injector.

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.