Technical Definition:

Exhaust Gas Recirculation (EGR) Flow Excessive Detected

Technical Description:

EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen.

Possible Causes:

• DPFE (differential pressure) sensor is faulty and needs to be replaced
• There is a blockage in the EGR (most likely carbon buildup)
• EGR valve fault
• EGR valve may not be opening due to a lack of vaccuum

Possible Symptoms:

Exhaust Gas Recirculation Flow Excessive Detected

Possible Solutions:

• Check the voltage at the DPFE sensor both at idle and when the EGR is open
• Replace the DPFE sensor

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– EGR volume control valve stuck open
– Faulty EGR volume control valve
– EGR solenoid valve harness is open or shorted
– EGR solenoid valve circuit poor electrical connection
– Faulty EGR temperature sensor and circuit

Specific Makes:

– Possible engine hesitation