What does code P2202 mean?

Q: What does code P2202 mean?

NOx Sensor Circuit Low Input (Bank 1 Sensor 1). P2202 means the engine computer has detected an abnormally low voltage signal from the upstream nitrogen oxide (NOx) sensor on bank 1, which is the sensor positioned before the catalytic converter on that cylinder bank. The computer expects the sensor's signal circuit to rest within a specific voltage window, and a reading below that threshold for a set time triggers this code.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P2202

P2202NOx Sensor Circuit Low Input (Bank 1 Sensor 1)

P2202 means the engine computer has detected an abnormally low voltage signal from the upstream nitrogen oxide (NOx) sensor on bank 1, which is the sensor positioned before the catalytic converter on that cylinder bank. The computer expects the sensor's signal circuit to rest within a specific voltage window, and a reading below that threshold for a set time triggers this code.

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.