P22A3
NOx Sensor Heater Control Circuit/Open Bank 1 Sensor 2
P22A3 is an OBD-II diagnostic trouble code meaning: NOx Sensor Heater Control Circuit/Open Bank 1 Sensor 2. Common causes: open circuit in the nox sensor heater power supply circuit, malfunction of the nox sensor itself. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- Increased emissions of harmful substances
- Possible starting problems in cold weather
Causes
- Open circuit in the NOx sensor heater power supply circuit
- Malfunction of the NOx sensor itself
- Damage to the wiring harness to the sensor
- Poor contact in the sensor connector
- Faulty heater circuit relay or fuse
How to Fix
- Check the integrity of the fuses and relays of the heater circuit
- Inspect the sensor wiring harness and connectors for damage.
- Check sensor heater resistance
- If necessary, replace the NOx sensor
- Clear the error and check if it returns
Related codes
Error P22A3 by Vehicle Brand
FAQ
What does the P22A3 code mean?
P22A3 is an OBD-II diagnostic trouble code that indicates: NOx Sensor Heater Control Circuit/Open Bank 1 Sensor 2
What causes a P22A3 error code?
The most common causes of P22A3 include: Open circuit in the NOx sensor heater power supply circuit; Malfunction of the NOx sensor itself; Damage to the wiring harness to the sensor; Poor contact in the sensor connector.
How do I fix a P22A3 diagnostic trouble code?
To fix P22A3: Check the integrity of the fuses and relays of the heater circuit. Inspect the sensor wiring harness and connectors for damage.. Check sensor heater resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P22A3?
Yes, but get it checked soon
How much does it cost to fix P22A3?
The estimated repair cost for P22A3 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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