Faulty NOx sensor or sensor control module; Damaged wiring or connector, often heat-related; CAN communication faults with the sensor module; Power supply or ground problems.

NOx sensors

P2200 NOx Sensor Circuit (Bank 1 Sensor 1)

Q: What does P2200 mean?

NOx Sensor Circuit (Bank 1 Sensor 1). The upstream NOx sensor measures NOx concentration before the SCR catalyst and reports to the ECU, usually through its own sensor control module. P2200 is set when a fault is detected in the sensor circuit or its signal.

The upstream NOx sensor measures NOx concentration before the SCR catalyst and reports to the ECU, usually through its own sensor control module. P2200 is set when a fault is detected in the sensor circuit or its signal.

Common causes

Faulty NOx sensor or sensor control module
Damaged wiring or connector, often heat-related
CAN communication faults with the sensor module
Power supply or ground problems

Typical symptoms

Check engine light (MIL) on
SCR operation limited or disabled
Countdown to engine start restriction on some vehicles
Reduced power on some vehicles

P2200 and NuoVolta

If the SCR/AdBlue system and its NOx sensors have been removed for off-road or motorsport use, where permitted by law, the NuoVolta AdBlue / SCR / NOx Removal solution adjusts the ECU calibration and the DTC removal feature can disable this code. Otherwise, check the sensor power supply and wiring first.

AdBlue / SCR / NOx Removal Available for 121 ECUs

Related codes

P2201NOx Sensor Circuit Range/Performance (Bank 1 Sensor 1) P229FNOx Sensor Circuit Range/Performance (Bank 1 Sensor 2) P2BADNOx Exceedance - Root Cause Unknown

Diagnose and repair real faults first. Removing or disabling emission systems is only permitted where allowed by law, for example for off-road or motorsport use.