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EGR System
The exhaust gas recirculation system consists of he exhaust
ducts (in the cylinder head and the intake manifold), the exhaust gas
recirculation valve with solenoid valve and the electronic system management
in the engine control unit.
1 Solenoid valve
2 Exhaust gas recirculation valve
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Function:
In exhaust gas recirculation, a defined amount of exhaust gas
is returned to the combustion process o reduce the formation of nitrogen
oxides.
There is a more detailed description in section 12,
"Fuel System - Exhaust System".
· Service
If the exhaust gas recirculation solenoid valve or the lead
between the exhaust gas recirculation solenoid valve and the control unit is
defective, the engine telltale illuminates and a trouble code is set in the
control unit.
The EGR valve can be checked using TECH 1 actuator
diagnosis.
In case of a defect, the control unit continues operating
with replacement values to ensure that the vehicle can reach the nearest
authorised Opel / Vauxhall workshop.
