DTC code

P0404: Exhaust Gas Recirculation Open Position Performance

Vehicle-specific published guides for this diagnostic trouble code.

Exhaust Gas Recirculation Open Position Performance

P0404 means the EGR valve position may not be matching what the engine control module expects when it commands the valve.

Article vehicle: 2020-2025 Chevrolet Silverado 2500 6.6 diesel

P0404 may mean the control module is commanding EGR valve movement, but the measured EGR position may not match the desired position as expected.

Article vehicle: 2020-2025 Chevrolet Silverado 2500 6.6 diesel