P23AF
NOx Sensor Circuit High Bank 1 Sensor 3
P23AF is an OBD-II diagnostic trouble code meaning: NOx Sensor Circuit High Bank 1 Sensor 3. Common causes: nox sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Increased fuel consumption
- Reduced engine power
- Unstable engine idling
- Increased NOx emissions
Causes
- NOx sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Wiring Harness Problems
- Engine control unit malfunction
How to Fix
- Check the integrity of the wiring to the NOx sensor
- Inspect the sensor connector for corrosion or damage.
- Check the resistance and voltage in the sensor circuit
- Replace NOx sensor if necessary
- Reset the fault code and check for its reoccurrence
Related codes
Error P23AF by Vehicle Brand
FAQ
What does the P23AF code mean?
P23AF is an OBD-II diagnostic trouble code that indicates: NOx Sensor Circuit High Bank 1 Sensor 3
What causes a P23AF error code?
The most common causes of P23AF include: NOx sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Wiring Harness Problems.
How do I fix a P23AF diagnostic trouble code?
To fix P23AF: Check the integrity of the wiring to the NOx sensor. Inspect the sensor connector for corrosion or damage.. Check the resistance and voltage in the sensor circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P23AF?
Yes, but get it checked soon
How much does it cost to fix P23AF?
The estimated repair cost for P23AF is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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