OBD-II code · Powertrain (generic, extended)
P2215 NOx Sensor Circuit Low (Bank 2)
NOx Sensor Circuit Low (Bank 2): the signal voltage is below the expected range. Often a short to ground or high resistance in the wiring.
Is it safe to drive with P2215?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyShort to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
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
- 1–3 h
- Emissions test
- Likely to fail
- Parts involved
- Nox Sensor
Related codes
- P2202NOx Sensor Circuit Low (Bank 1)
- P2213NOx Sensor Circuit (Bank 2)
- P2212NOx Sensor Heater Sense Circuit Intermittent (Bank 1 Sensor 1)
- P2214NOx Sensor Circuit Range/Performance (Bank 2)
- P2216NOx Sensor Circuit High (Bank 2)
- P2217NOx Sensor Circuit Intermittent (Bank 2)
- P2218NOx Sensor Heater Control Circuit/Open (Bank 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.