OBD-II Generic Error Code P0476: How to Fix It

Q: What does error code P0476 mean?

P0476 stands for 'Exhaust Pressure Control Valve Range/Performance.' It means the ECM detected the exhaust back pressure valve is not operating within its expected range, often due to sticking, blockage, or electrical issues.

Q: Can I drive with a P0476 code?

You may experience reduced power and fuel economy. It is safe to drive short distances, but prolonged driving can cause further damage to the turbo or exhaust system. It's best to diagnose and fix promptly.

Q: What vehicles are affected by P0476?

This code is common in diesel vehicles with turbochargers, such as Ford Power Stroke, Dodge Cummins, and some GM Duramax engines. It can also appear in gasoline engines with exhaust back pressure systems.

Q: How much does it cost to fix P0476?

Costs vary. Cleaning the valve might be minimal (under $50). Replacing the valve or actuator can range from $150-$400 for parts, plus labor. Professional repair typically costs $200-$600.

Q: Can a bad actuator cause P0476?

Yes, a faulty actuator (stuck, open, or shorted) is a common cause. Testing the actuator with a multimeter and scan tool is an important diagnostic step.

Abstract

Diagnostic trouble code (DTC) P0476 indicates that the engine control module (ECM) has detected the exhaust back pressure control valve is stuck or out of range. This often affects turbocharged diesel engines and can reduce performance. The fix involves inspecting the valve, actuator, and related wiring.