P22A5
NOx Sensor Heater Control Circuit High Bank 1 Sensor 2
P22A5 is an OBD-II diagnostic trouble code meaning: NOx Sensor Heater Control Circuit High Bank 1 Sensor 2. Common causes: nox sensor heater circuit short circuit, heater control circuit open. Estimated repair cost: $167–444.
Symptoms
- Check Engine light comes on
- Deterioration of the exhaust gas cleaning system
- Possible reduction in engine power
- Increased fuel consumption
- Unstable engine idling
Causes
- NOx sensor heater circuit short circuit
- Heater control circuit open
- NOx sensor malfunction
- Damaged wiring harness or connectors
- Problems with the engine control unit
How to Fix
- Check the continuity of the NOx 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 fault code and check if it returns
Related codes
Error P22A5 by Vehicle Brand
FAQ
What does the P22A5 code mean?
P22A5 is an OBD-II diagnostic trouble code that indicates: NOx Sensor Heater Control Circuit High Bank 1 Sensor 2
What causes a P22A5 error code?
The most common causes of P22A5 include: NOx sensor heater circuit short circuit; Heater control circuit open; NOx sensor malfunction; Damaged wiring harness or connectors.
How do I fix a P22A5 diagnostic trouble code?
To fix P22A5: Check the continuity of the NOx 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 P22A5?
Yes, but get it checked soon
How much does it cost to fix P22A5?
The estimated repair cost for P22A5 is $167–444. Actual cost depends on your vehicle, location, and labor rates.
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