P2215NOx Sensor Circuit Low (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2215 says the NOx value transmitted for bank 2 falls below the smallest figure a healthy sensor can deliver. Because smart NOx sensors talk over CAN, the limit is a concentration in ppm, not a wire voltage. No manufacturer publishes this bank 2 code; the diesels on record send both banks through one SCR system and use P2202 instead. Those bank 1 limits give the scale: GM's 6.6L and 3.0L Duramax flag readings below minus 90 ppm (on the LZ0 only after the dew point is reached, Type B over two trips), VW's 2014 Touareg TDI below minus 105 ppm. A strongly negative value usually comes from a drifted element or a fault inside the sensor electronics. P2216 is the high limit, P2213 the general circuit fault.
- What you may notice
- Malfunction indicator lamp on
- Negative NOx value for bank 2 in live data
- DEF dosing switches to a substitute strategy
- Likely causes
- LikelyNOx element of the bank 2 sensor drifted low
- PossibleFault in the measuring electronics of the sensor module
- RareDamaged lead between probe and sensor module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €150 – €1,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.