P0479 Fault Code

Exhaust Pressure Control Valve Intermittent

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

The P0479 fault code indicates an intermittent issue with the exhaust pressure control valve. This valve plays a crucial role in managing the exhaust gas flow, ensuring optimal performance and emissions control in your vehicle. If this code appears, it suggests that there may be an intermittent failure or poor connection in the valve's circuitry.

What are the symptoms of the P0479 code?

Drivers may experience several symptoms related to the P0479 fault code, including:

• Reduced engine performance and power
• Increased fuel consumption
• Unusual noises from the exhaust system
• Check Engine Light illumination on the dashboard

What causes the P0479 code?

Common causes of the P0479 code include:

• Faulty exhaust pressure control valve
• Wiring issues such as frayed or corroded connections
• Malfunctioning sensors or ECM (Engine Control Module)
• Blockages in the exhaust system affecting pressure readings

How to fix P0479?

To resolve the P0479 issue, follow these steps:

• Inspect the exhaust pressure control valve for signs of damage or wear
• Check the wiring and connectors for any fraying or corrosion
• Test the valve operation to confirm it opens and closes correctly
• Replace faulty components as necessary and clear the error code with a diagnostic tool
• Perform a road test to ensure the issue has been resolved and the Check Engine Light remains off.