Exhaust Gas Recirculation (EGR) System
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
The EGR system:
- returns a small amount of exhaust gas into the engine for re-combustion.
- reduces the overall combustion temperature and provides a significant reduction of oxides of nitrogen (NOx).
The EGR valve:
- is electronically controlled by the powertrain control module (PCM).
- controls the vacuum to the EGR valve.
The EGR valve:
- is connected to the exhaust manifold by the EGR valve to exhaust manifold tube.
- controls recirculated exhaust gas flow to the intake manifold.
- monitors the flow of recirculated exhaust gases through the EGR valve to exhaust manifold tube.
- returns a signal to the PCM.
The amount of recirculated exhaust gas depends upon:
- engine RPM.
- intake manifold vacuum.
- exhaust back pressure.
- engine coolant temperature.
- throttle position.
The vehicle emission control information (VECI) decal:
- is located on the hood.
- lists the exhaust emission control system information.