P2225 Fault Code

NOx Sensor Heater Sense Circuit Intermittent Bank 2

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

The P2225 fault code indicates an intermittent issue with the NOx sensor heater sense circuit for Bank 2. This problem can lead to incorrect readings of nitrogen oxide, causing poor engine performance and increased emissions. Monitoring the NOx levels is crucial for maintaining emissions compliance and optimal engine function.

What are the symptoms of the P2225 code?

Symptoms may include:

• Illumination of the check engine light
• Poor fuel efficiency due to incorrect air-fuel mixture
• Increased emissions, potentially leading to failure in emissions testing
• Rough engine idle or performance issues while driving

What causes the P2225 code?

Possible causes include:

• Faulty NOx sensor heater circuit
• Damaged wiring or connectors leading to the sensor
• Short circuits or open circuits in the electrical system
• Defective engine control unit (ECU) not processing signals correctly
• Corrosion or contamination within the connector terminals

How to fix P2225?

To fix the P2225 fault code, consider the following steps:

• Inspect the wiring and connectors for damage, repairing or replacing as necessary
• Test the NOx sensor and heater circuit for continuity and proper functioning, replacing the sensor if defective
• Clear the fault codes and conduct a road test to see if the issue recurs
• If problems persist, consider diagnosing the ECU functionality