What does code P220C mean?

Q: What does code P220C mean?

NOx Sensor Supply Voltage Circuit (Bank 2 Sensor 1). P220C indicates that the engine control module has detected an abnormal voltage on the supply circuit feeding the nitrogen oxide (NOx) sensor located in bank 2, sensor 1. The computer monitors the voltage supplied to the sensor and sets this code when the circuit falls outside the expected range, which can prevent the sensor from operating correctly and may affect emissions compliance.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P220C

P220CNOx Sensor Supply Voltage Circuit (Bank 2 Sensor 1)

P220C indicates that the engine control module has detected an abnormal voltage on the supply circuit feeding the nitrogen oxide (NOx) sensor located in bank 2, sensor 1. The computer monitors the voltage supplied to the sensor and sets this code when the circuit falls outside the expected range, which can prevent the sensor from operating correctly and may affect emissions compliance.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

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