P11DC
NOx Sensor 2 Current Performance
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- Unstable engine idling
- Dips during acceleration
Causes
- NOx 2 sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Sensing element is dirty or damaged
- Problems with the SCR system
How to Fix
- Check the integrity of the sensor wiring and connectors
- Clean sensor connector contacts
- Check sensor readings using diagnostic equipment
- Replace NOx 2 sensor if necessary
- Check the operation of the SCR system