P0476 Fault Code

Exhaust Pressure Control Valve Range/Performance

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

The P0476 fault code indicates an issue with the exhaust pressure control valve. This component is responsible for regulating the pressure within the exhaust system to optimize performance and emissions. When this valve is not functioning correctly, it can lead to poor engine performance and increased emissions. This code is typically triggered when the powertrain control module (PCM) detects a performance issue.

What are the symptoms of the P0476 code?

Symptoms associated with the P0476 code can vary but may include:

• Poor acceleration or performance
• Reduced fuel efficiency
• Increased emissions
• Check Engine Light (CEL) illuminated
• Possible unusual engine noises during operation

What causes the P0476 code?

Common causes of the P0476 code include:

• A faulty exhaust pressure control valve
• Blocked or damaged vacuum lines
• Wiring issues, such as short circuits or open circuits
• Faulty sensors related to exhaust pressure
• Intake or exhaust leaks that affect pressure readings

How to fix P0476?

To resolve the P0476 fault code, consider the following steps:

• Inspect the exhaust pressure control valve for proper operation and replace it if necessary.
• Check for vacuum leaks in hoses and lines, repairing or replacing as needed.
• Examine the wiring and connectors related to the exhaust pressure control system for damages or disconnections.
• Clear the fault code and run the engine to see if the code returns, ensuring the repair has been successful.