What does code P22A6 mean?

Q: What does code P22A6 mean?

NOx Sensor Heater Sense Circuit (Bank 1 Sensor 2). P22A6 indicates that the powertrain control module has detected an abnormal signal from the heater sense circuit of the downstream nitrogen oxide sensor on bank 1. The computer monitors the current or voltage returned by the sensor's heater element and sets this code when the reading falls outside the expected range for the given operating conditions.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P22A6

P22A6NOx Sensor Heater Sense Circuit (Bank 1 Sensor 2)

P22A6 indicates that the powertrain control module has detected an abnormal signal from the heater sense circuit of the downstream nitrogen oxide sensor on bank 1. The computer monitors the current or voltage returned by the sensor's heater element and sets this code when the reading falls outside the expected range for the given operating conditions.

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.