P125B
Nitrogen Oxide Sensor Heating Heat Output Too Low During Operation
P125B is an OBD-II diagnostic trouble code meaning: Nitrogen Oxide Sensor Heating Heat Output Too Low During Operation. Common causes: nox sensor malfunction, problems in the sensor heating circuit. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Problems with passing technical inspection
- Incorrect operation of the exhaust gas purification system
Causes
- NOx sensor malfunction
- Problems in the sensor heating circuit
- Open or short circuit in wiring
- Engine control unit malfunction
- Poor contact in sensor connectors
How to Fix
- Check the integrity of the sensor heating circuit
- Inspect connectors and wiring for damage
- Check the resistance of the sensor heating element
- If necessary, replace the NOx sensor
- Check and update engine control unit software
Related codes
FAQ
What does the P125B code mean?
P125B is an OBD-II diagnostic trouble code that indicates: Nitrogen Oxide Sensor Heating Heat Output Too Low During Operation
What causes a P125B error code?
The most common causes of P125B include: NOx sensor malfunction; Problems in the sensor heating circuit; Open or short circuit in wiring; Engine control unit malfunction.
How do I fix a P125B diagnostic trouble code?
To fix P125B: Check the integrity of the sensor heating 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 P125B?
Yes, but get it checked soon
How much does it cost to fix P125B?
The estimated repair cost for P125B is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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