The NOx sensor circuit has failed. On Euro 6 diesels this stops the AdBlue and NOx trap strategy working and often triggers a countdown to restricted starting.
P2200 — also written P22OO, P 2200, 2200 — is the OBD-II code for nox sensor circuit (bank 1). Same code, same fix: this page covers every spelling of it.
P2200 is a emissions fault code, typically costing £250–£900 to put right in a UK garage.
What causes P2200?
- Failed NOx sensor (a known wear item)
- Corroded sensor connector under the car
- Chafed wiring
- Sensor contaminated by an oil-burning engine
How P2200 is fixed
- Read NOx sensor live values
- Replace the sensor and code it where required
- Repair the loom and reseal the connector
P2200 repair cost in the UK
Most P2200 repairs land between £250–£900 including parts and labour. The spread is wide because the cheap fix (a sensor, a hose, a leak) and the expensive fix (a major component) throw the same code — which is why a proper diagnosis before parts are bought saves the most money.
Can you drive with P2200?
Yes for now, but some cars begin a limited-restart countdown — do not leave it for months.
Urgency: high.