P23BB
NOx Sensor Heater Resistance Bank 1 Sensor 3
P23BB is an OBD-II diagnostic trouble code meaning: NOx Sensor Heater Resistance Bank 1 Sensor 3. Common causes: open or short circuit in the nox sensor heater circuit, malfunction of the nox sensor itself. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Increased fuel consumption
- Reduced engine power
- Unstable engine idling
- Increased NOx emissions
Causes
- Open or short circuit in the NOx sensor heater circuit
- Malfunction of the NOx sensor itself
- Connector problems or contact corrosion
- Engine control unit malfunction
- Wiring harness damage
How to Fix
- Check the continuity of the NOx sensor heater circuit
- Inspect connectors and contacts for corrosion
- Check the resistance of the sensor heating element
- Replace NOx sensor if necessary
- Check and, if necessary, update the ECU software
Related codes
Error P23BB by Vehicle Brand
FAQ
What does the P23BB code mean?
P23BB is an OBD-II diagnostic trouble code that indicates: NOx Sensor Heater Resistance Bank 1 Sensor 3
What causes a P23BB error code?
The most common causes of P23BB include: Open or short circuit in the NOx sensor heater circuit; Malfunction of the NOx sensor itself; Connector problems or contact corrosion; Engine control unit malfunction.
How do I fix a P23BB diagnostic trouble code?
To fix P23BB: Check the continuity of the NOx sensor heater circuit. Inspect connectors and contacts for corrosion. Check the resistance of the sensor heating element. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P23BB?
Yes, but get it checked soon
How much does it cost to fix P23BB?
The estimated repair cost for P23BB is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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