P23B4
NOx Sensor Heater Sense Circuit Bank 1 Sensor 3
P23B4 is an OBD-II diagnostic trouble code meaning: NOx Sensor Heater Sense Circuit Bank 1 Sensor 3. Common causes: nox sensor malfunction, open or short circuit in heating circuit. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Dips during acceleration
- Unstable engine idling
Causes
- NOx sensor malfunction
- Open or short circuit in heating circuit
- Poor contact in the sensor connector
- Wiring harness damage
- Engine control unit malfunction
How to Fix
- Check the continuity of the NOx sensor heating circuit
- Inspect connectors and wires for damage
- Check the resistance of the sensor heating element
- If necessary, replace the NOx sensor
- Reset the error code and check if it returns
Related codes
Error P23B4 by Vehicle Brand
FAQ
What does the P23B4 code mean?
P23B4 is an OBD-II diagnostic trouble code that indicates: NOx Sensor Heater Sense Circuit Bank 1 Sensor 3
What causes a P23B4 error code?
The most common causes of P23B4 include: NOx sensor malfunction; Open or short circuit in heating circuit; Poor contact in the sensor connector; Wiring harness damage.
How do I fix a P23B4 diagnostic trouble code?
To fix P23B4: Check the continuity of the NOx sensor heating circuit. Inspect connectors and wires for damage. Check the resistance of the sensor heating element. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P23B4?
Yes, but get it checked soon
How much does it cost to fix P23B4?
The estimated repair cost for P23B4 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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