P2214
NOx Sensor Circuit Range/Performance Bank 2
NOx / SCR emissions
Generic OBD-II
Medium
What it means
P2214 means the ECM sees the bank 2 NOx sensor reporting an implausible or out-of-range value, part of the diesel SCR/emissions system that measures nitrogen-oxide output. It's mainly an emissions fault, though some diesels reduce power if it persists. The usual causes are a failing NOx sensor or wiring, resistance, and connector problems in its circuit.
Medium
Can I keep driving? Usually driveable, but on diesels a NOx-sensor fault can trigger reduced power or a DEF/SCR warning, so get it checked to avoid a derate.
Common symptoms
What you'll notice
- Check-engine light on
- Possible reduced power or SCR/DEF warning (diesels)
- Failed emissions test or incomplete readiness monitor
- Higher NOx emissions
Common causes
Most likely first
- Faulty NOx sensor (bank 2)Likely
- Wiring open, short, or high resistance in the NOx sensor circuitCommon
- Poor or corroded connector at the sensorCommon
- Exhaust leak near the sensor affecting its readingLess often
- NOx sensor module or PCM fault (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and compare the NOx sensor's reading against expected values.
- Inspect the sensor connector and wiring for damage, corrosion, or high resistance.
- Check for exhaust leaks near the sensor.
- Replace the NOx sensor if it reads out of range and the wiring is good.
- Clear the code and retest.
FAQ
Quick answers
Is it safe to drive with P2214?+
Usually yes short-term, but it's mainly an emissions fault and some diesels reduce power or warn on the SCR/DEF system if it persists. Have it diagnosed before it forces a derate.
Can I just clear P2214?+
You can, but it returns once the ECM again sees the sensor reading out of range. Fix the sensor or wiring first.
Related codes
Often seen with P2214
Read & clear P2214 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX