OBD-II code · Powertrain (generic, extended)
P2211 NOx Sensor Heater Sense Circuit Intermittent (Bank 2)
The heater sense line on the bank 2 NOx sensor produces intermittent readings. Often a thermal fault inside the sensor or a connector under temperature cycling.
Is it safe to drive with P2211?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyConnector intermittent under temperature
- PossibleSensor heater intermittent when hot
- Less likelyHarness routed against vibrating component
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 Heater
Related codes
- P2208NOx Sensor Heater Circuit (Bank 2)
- P2225NOx Sensor Heater Sense Circuit Intermittent (Bank 2)
- P220ENOx Sensor Heater Control Circuit Range/Performance (Bank 1 Sensor 1)
- P220FNOx Sensor Heater Control Circuit Range/Performance (Bank 1 Sensor 2)
- P2210NOx Sensor Circuit Intermittent (Bank 2)
- P2212NOx Sensor Heater Sense Circuit Intermittent (Bank 1 Sensor 1)
- P2213NOx Sensor Circuit (Bank 2)
- P2214NOx Sensor Circuit Range/Performance (Bank 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.