P22A1

Symptoms

• Check Engine light comes on
• Reduced engine power
• Increased fuel consumption
• The engine may go into emergency mode
• Increased NOx emissions

Causes

• NOx sensor malfunction (bank 1, sensor 2)
• Open or short circuit in the sensor circuit
• Damage to the sensor wiring harness
• Corrosion or poor contact in connectors
• Engine control module (ECU) malfunction

How to Fix

1. Check the continuity of the NOx sensor circuit
2. Inspect connectors and connections for corrosion or damage
3. Check sensor voltage and resistance according to manufacturer specifications
4. If necessary, replace the NOx sensor
5. Reset the error and check if it returns

Related codes

Error P22A1 by Vehicle Brand