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 | |||
|---|---|---|---|
| .P. E4393.tif | 9 | 7,5 | tiff;; |
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.