Powertrain
generic / SAE
P2206
NOx Sensor Circuit (Bank 2)
A general electrical fault on the bank 2 NOx sensor circuit. NOx sensors are smart sensors with a CAN/LIN interface; this code typically indicates that the sensor module no longer responds.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / 06
Possible causes
- NOx sensor module failed high
- Wiring open or connector loose medium
Symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 300–1000 €
- Estimated time: 0.5–2 h
- Component: nox sensor b2
- Component: nox sensor wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012