P23B1
NOx Sensor Heater Control Circuit/Open Bank 1 Sensor 3
P23B1 is an OBD-II diagnostic trouble code meaning: NOx Sensor Heater Control Circuit/Open Bank 1 Sensor 3. Common causes: nox sensor heater circuit open, malfunction of the nox sensor itself. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Unstable engine idling
- Increased level of harmful emissions
Causes
- NOx sensor heater circuit open
- Malfunction of the NOx sensor itself
- Wiring harness damage
- Poor contact in the sensor connector
- Engine control unit (ECU) malfunction
How to Fix
- Check the continuity of the sensor heater circuit
- Inspect connectors and wiring 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 P23B1 by Vehicle Brand
FAQ
What does the P23B1 code mean?
P23B1 is an OBD-II diagnostic trouble code that indicates: NOx Sensor Heater Control Circuit/Open Bank 1 Sensor 3
What causes a P23B1 error code?
The most common causes of P23B1 include: NOx sensor heater circuit open; Malfunction of the NOx sensor itself; Wiring harness damage; Poor contact in the sensor connector.
How do I fix a P23B1 diagnostic trouble code?
To fix P23B1: Check the continuity of the sensor heater circuit. Inspect connectors and wiring 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 P23B1?
Yes, but get it checked soon
How much does it cost to fix P23B1?
The estimated repair cost for P23B1 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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