P23B3
NOx Sensor Heater Control Circuit High Bank 1 Sensor 3
P23B3 is an OBD-II diagnostic trouble code meaning: NOx Sensor Heater Control Circuit High Bank 1 Sensor 3. Common causes: open or short circuit in the nox sensor heater circuit, nox sensor malfunction. Estimated repair cost: $89–278.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Unstable engine idling
- Dips during acceleration
Causes
- Open or short circuit in the NOx sensor heater circuit
- NOx sensor malfunction
- Problems with the wiring harness or connectors
- Engine control unit (ECU) malfunction
- Corroded contacts or damaged wiring
How to Fix
- Check the continuity of the NOx sensor heater circuit
- Check NOx sensor heater resistance
- Inspect connectors and wiring harness for damage
- If necessary, replace the NOx sensor
- Check and, if necessary, update the ECU firmware
Related codes
Error P23B3 by Vehicle Brand
FAQ
What does the P23B3 code mean?
P23B3 is an OBD-II diagnostic trouble code that indicates: NOx Sensor Heater Control Circuit High Bank 1 Sensor 3
What causes a P23B3 error code?
The most common causes of P23B3 include: Open or short circuit in the NOx sensor heater circuit; NOx sensor malfunction; Problems with the wiring harness or connectors; Engine control unit (ECU) malfunction.
How do I fix a P23B3 diagnostic trouble code?
To fix P23B3: Check the continuity of the NOx sensor heater circuit. Check NOx sensor heater resistance. Inspect connectors and wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P23B3?
Yes, but get it checked soon
How much does it cost to fix P23B3?
The estimated repair cost for P23B3 is $89–278. Actual cost depends on your vehicle, location, and labor rates.
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