P2224 Fault Code

NOx Sensor Heater Sense Circuit High Bank 2

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2224 fault code indicates a problem with the NOx (Nitrogen Oxide) sensor heater sense circuit for Bank 2. This sensor is crucial for monitoring the level of nitrogen oxides in the exhaust and ensuring the vehicle's emissions are within regulatory limits. A high reading in the sense circuit suggests an issue that could lead to incorrect sensor readings and potentially increased emissions.

What are the symptoms of the P2224 code?

• Check Engine Light (CEL) illuminated on the dashboard
• Increased emissions during testing
• Poor engine performance or reduced fuel efficiency
• Possible failure in emissions testing if the issue persists

What causes the P2224 code?

• Faulty NOx sensor heater
• Wiring issues or short circuits in the harness
• Corrosion or poor connections in the circuit
• ECU (Engine Control Unit) malfunction contributing to incorrect readings

How to fix P2224?

• Inspect the NOx sensor heater for faults and replace if necessary
• Check wiring and connections for damage or corrosion, repair as needed
• Use a multimeter to test the voltage and ground on the sensor circuit
• Reset the fault codes and test drive to confirm the issue is resolved