P22AA
NOx Sensor Heater Sense Circuit Intermittent Bank 1 Sensor 2
P22AA is an OBD-II diagnostic trouble code meaning: NOx Sensor Heater Sense Circuit Intermittent Bank 1 Sensor 2. Common causes: open or short circuit in nox sensor heating circuit, nox sensor malfunction. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Increased emissions of harmful substances
- Reduced engine power
- Unstable engine idling
- Possible transition to emergency mode
Causes
- Open or short circuit in NOx sensor heating circuit
- NOx sensor malfunction
- Problems with the wiring harness or connectors
- Engine control unit malfunction
- Corroded contacts or damaged wiring
How to Fix
- Check the continuity of the NOx sensor heating circuit
- Inspect connectors and wiring harness 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
Error P22AA by Vehicle Brand
FAQ
What does the P22AA code mean?
P22AA is an OBD-II diagnostic trouble code that indicates: NOx Sensor Heater Sense Circuit Intermittent Bank 1 Sensor 2
What causes a P22AA error code?
The most common causes of P22AA include: Open or short circuit in NOx sensor heating circuit; NOx sensor malfunction; Problems with the wiring harness or connectors; Engine control unit malfunction.
How do I fix a P22AA diagnostic trouble code?
To fix P22AA: Check the continuity of the NOx sensor heating circuit. Inspect connectors and wiring harness 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 P22AA?
Yes, but get it checked soon
How much does it cost to fix P22AA?
The estimated repair cost for P22AA is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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