P23B2
NOx Sensor Heater Control Circuit Low Bank 1 Sensor 3
P23B2 is an OBD-II diagnostic trouble code meaning: NOx Sensor Heater Control Circuit Low Bank 1 Sensor 3. Common causes: nox sensor heater circuit open, short circuit in control circuit. Estimated repair cost: $89–278.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Dips during acceleration
- Unstable idling
Causes
- NOx sensor heater circuit open
- Short circuit in control circuit
- Malfunction of the NOx sensor itself
- Wiring Harness Problems
- Engine control unit malfunction
How to Fix
- Check the continuity of the sensor heater circuit
- Check sensor heater resistance
- Inspect the wiring harness for damage
- Check the power and ground of the control circuit
- Replace NOx sensor if necessary
Related codes
Error P23B2 by Vehicle Brand
FAQ
What does the P23B2 code mean?
P23B2 is an OBD-II diagnostic trouble code that indicates: NOx Sensor Heater Control Circuit Low Bank 1 Sensor 3
What causes a P23B2 error code?
The most common causes of P23B2 include: NOx sensor heater circuit open; Short circuit in control circuit; Malfunction of the NOx sensor itself; Wiring Harness Problems.
How do I fix a P23B2 diagnostic trouble code?
To fix P23B2: Check the continuity of the sensor heater circuit. Check sensor heater resistance. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P23B2?
Yes, but get it checked soon
How much does it cost to fix P23B2?
The estimated repair cost for P23B2 is $89–278. Actual cost depends on your vehicle, location, and labor rates.
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