P23AE

Symptoms

• Check Engine Light Is On
• Reduced engine power
• Deteriorating fuel economy
• Increased emissions
• Possible transition to emergency mode

Causes

• Faulty NOx sensor
• Open or short circuit in the sensor circuit
• Poor contact in the sensor connector
• Problems with power or grounding of the sensor
• ECU malfunction (rare)

How to Fix

1. Check the integrity of the wiring and connectors of the NOx sensor
2. Check the supply voltage and grounding of the sensor
3. Check the sensor resistance (compare with standards)
4. If necessary, replace the NOx sensor
5. Reset the error and check if it returns

Related codes

Error P23AE by Vehicle Brand