OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P2206?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyNOx sensor module failed
- PossibleWiring open or connector loose
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)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Nox Sensor B2, Nox Sensor Wiring
Related codes
- P2200NOx Sensor Circuit (Bank 1)
- P2213NOx Sensor Circuit (Bank 2)
- P2203NOx Sensor Circuit High (Bank 1)
- P2204NOx Sensor Circuit Intermittent (Bank 1)
- P2205NOx Sensor Heater Control Circuit (Bank 1)
- P2207NOx Sensor Circuit Range/Performance (Bank 2)
- P2208NOx Sensor Heater Circuit (Bank 2)
- P2209NOx Sensor Heater Sense Circuit Range/Performance (Bank 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.