P11FC
O2 Low Reference Circuit (NOx Sensor 2)
P11FC is an OBD-II diagnostic trouble code meaning: O2 Low Reference Circuit (NOx Sensor 2). Common causes: nox sensor number 2 malfunction, open or short circuit in sensor wiring. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Increased fuel consumption
- Reduced engine power
- Engine transition to emergency mode
- Increased emissions of harmful substances
Causes
- NOx sensor number 2 malfunction
- Open or short circuit in sensor wiring
- Sensor power problems
- Corrosion of contacts or connectors
- Malfunction of the engine control unit (rare)
How to Fix
- Check NOx sensor number 2 wiring and connectors for damage.
- Check the power supply and ground of the sensor
- Check NOx sensor resistance and signal
- Replace NOx sensor number 2 if necessary
- Reset the error code and check the system
Related codes
FAQ
What does the P11FC code mean?
P11FC is an OBD-II diagnostic trouble code that indicates: O2 Low Reference Circuit (NOx Sensor 2)
What causes a P11FC error code?
The most common causes of P11FC include: NOx sensor number 2 malfunction; Open or short circuit in sensor wiring; Sensor power problems; Corrosion of contacts or connectors.
How do I fix a P11FC diagnostic trouble code?
To fix P11FC: Check NOx sensor number 2 wiring and connectors for damage.. Check the power supply and ground of the sensor. Check NOx sensor resistance and signal. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P11FC?
Yes, but get it checked soon
How much does it cost to fix P11FC?
The estimated repair cost for P11FC is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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