P2208 Fault Code

NOx Sensor Heater Sense Circuit Bank 1

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

The P2208 fault code indicates an issue with the NOx (Nitrogen Oxide) sensor heater sense circuit for Bank 1. This sensor is crucial for monitoring the levels of nitrogen oxide emissions in the exhaust gases, which helps ensure compliance with emission standards and optimal engine performance. When this circuit malfunctions, it can lead to increased emissions and reduced fuel efficiency.

What are the symptoms of the P2208 code?

Symptoms associated with the P2208 code may include:

• Check Engine Light illuminated on the dashboard
• Increased exhaust emissions
• Decreased fuel economy
• Rough engine performance or hesitation during acceleration
• Failure of emissions testing

What causes the P2208 code?

Common causes of the P2208 fault code include:

• Faulty NOx sensor heater
• Wiring issues such as shorts or open circuits
• Poor connections or corrosion in the electrical connectors
• Faulty Engine Control Module (ECM) affecting the sensor readings
• Blown fuses related to the NOx sensor circuit

How to fix P2208?

To resolve the P2208 fault code, consider the following steps:

1. Inspect the wiring and connectors for damage, corrosion, or loose connections.
2. Test the NOx sensor heater for proper operation and replace it if necessary.
3. Check related fuses and replace any that are blown.
4. Use a scan tool to clear the fault code and monitor the system for any reoccurrence of issues.
5. If the problem persists, further diagnose the Engine Control Module (ECM) to ensure it is not faulty.