P11C0
O2 Reference Voltage Circuit High Voltage (NOx Sensor 2)
P11C0 is an OBD-II diagnostic trouble code meaning: O2 Reference Voltage Circuit High Voltage (NOx Sensor 2). Common causes: nox sensor circuit short to power, broken or damaged sensor wiring. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Deterioration in fuel consumption characteristics
- Dips during acceleration
- Possible transition to emergency mode
Causes
- NOx sensor circuit short to power
- Broken or damaged sensor wiring
- Bank 2 NOx sensor malfunction
- Problems with sensor connectors
- Engine control module (ECU) malfunction
How to Fix
- Check the integrity of the NOx sensor wiring and connectors
- Measure the resistance and voltage in the sensor circuit
- Check NOx sensor for damage
- If necessary, replace NOx sensor bank 2
- Check and, if necessary, update ECU software
Related codes
FAQ
What does the P11C0 code mean?
P11C0 is an OBD-II diagnostic trouble code that indicates: O2 Reference Voltage Circuit High Voltage (NOx Sensor 2)
What causes a P11C0 error code?
The most common causes of P11C0 include: NOx sensor circuit short to power; Broken or damaged sensor wiring; Bank 2 NOx sensor malfunction; Problems with sensor connectors.
How do I fix a P11C0 diagnostic trouble code?
To fix P11C0: Check the integrity of the NOx sensor wiring and connectors. Measure the resistance and voltage in the sensor circuit. Check NOx sensor for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P11C0?
Yes, but get it checked soon
How much does it cost to fix P11C0?
The estimated repair cost for P11C0 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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