Exhaust Gas RECIRCULATION, Diesel: Description
WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
The Exhaust Gas Recirculation (EGR) system (1) reduces Oxides of Nitrogen (NOx) in the engine exhaust. This is accomplished by allowing a predetermined amount of hot exhaust gases to recirculate and dilute the incoming fuel and air mixture.
The Exhaust Gas Recirculation (EGR) system consists of the following components:
- EGR cooler
- EGR cooler manifold
- EGR vacuum valve solenoid
- EGR valve
- EGR wastegate vacuum solenoid
- EGR wastegate valve solenoid
- Powertrain Control Module (PCM)
- Vacuum pump
- Vacuum reservoir, lines and hoses
A malfunctioning EGR system can cause engine stumble, hesitation, rough idle, engine stalling and poor driveability.