P2201

Symptoms

• Check Engine light comes on
• Deterioration of engine performance
• Increased fuel consumption
• Increased NOx emissions
• Possible misfires

Causes

• NOx sensor malfunction
• Open or short circuit in the sensor circuit
• Poor contact in the sensor connector
• Problems with the engine management system
• NOx sensor contamination

How to Fix

1. Check the continuity of the NOx sensor circuit
2. Inspect the sensor connector for damage
3. Check the sensor readings using a diagnostic scanner
4. If necessary, replace the NOx sensor
5. Reset the fault code and check if it returns

Related codes

Error P2201 by Vehicle Brand