OBD-II code · Powertrain (generic, extended)
P22FE NOx Sensor Sensing Element Bank 1 Sensor 2
NOx Sensor Sensing Element Bank 1 Sensor 2: the control module has detected this fault condition.
Is it safe to drive with P22FE?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor element poisoned by silicone, sulphur or oil ash
- PossibleThermal shock from condensate (cold start with wet exhaust)
- PossibleSensor at end of service life
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
- Best left to a mechanic
- Typical labour
- 1–1.8 h
- Emissions test
- Likely to fail
- Parts involved
- Nox Sensor Post Scr B1
Related codes
- P23C1NOx Sensor Sensing Element Bank 1 Sensor 3
- P22FBNOx Sensor Performance - Sensing Element (Bank 1 Sensor 1)
- P22FCNOx Sensor Performance - Slow Response Low to High (Bank 1 Sensor 2)
- P22FDNOx Sensor Performance Slow Response High to Low Bank 1 Sensor 2
- P22FFSCR NOx Catalyst Inlet Temperature Too Low
- P2300Ignition Coil A Primary Control Circuit Low
- P2301Ignition Coil A Primary Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.