i think the ecu only needs resetting if the valve is removed (unplugged) vx have a field remedy and there are part numbers for the vx blanking plate.. my car is playing up again so told them to change the coil pack and throttle body and tdc sensor got it booked in for the 30th might try and get them to do the the work---below taken from tis 2000
Field Remedy: 1721
Subject: Engine Z22SE-EGR Valve - Defective EGR Valve to be omit
Models: Engines: Option:
Vectra-C 2002...2004,Astra-G 2000...2004,Zafira 2001...2004,Astra-G Coupe 2000...2004,Astra-G Cabrio 2001...2004 Z22SE,Z22SE,Z22SE,Z22SE,Z22SE
Complaint: Defective EGR valves should be removed on the Z22SE engine. The EGR pipe remains in the engine.
Cause: The Euro 4 emission standard will be met even without EGR-valve. This is because of a modified Z22SE ECU calibration.
Production: On Speedster the EGR valve will remain until end of production. On the Vectra-C, Astra-G and Zafira the EGR-valve will be omit during MY 2004 (running change). The following modifications will be introduced: 1. Engine wiring harness adapted 2. Cover plate for the exhaust gas recirculation duct 3. Omission of exhaust gas recirculation pipe 4. Intake manifold without connection for exhaust gas recirculation pipe 5. New engine control unit calibration 6. Modified bracket for upper engine cover
Remedy:
In case of customer complaint where an EGR valve is detected as faulty
during diagnosis, it should not be renewed but removed.
1. Close exhaust gas recirculation port with a cover plate (Part-/Cat.-No.:
24575592 / 58 50 526) by using gasket (Part-/Cat.-No.: 12570863 / 08 51 761).
The groove on the plate has to show in direction of radiator and and the
plate labeling upwards.
2. Fix the superfluous wiring harness connector with a cable strap
(connector port in direction to front wall).
3. Program ECU with SPS as of TIS-CD 50 (select without EGR).
For torque values and labour time please refer to Service Instruction
"Demounting and mounting EGR valve".
Please note:
On the Astra-G and Zafira with Z 22 SE engines, this conversion can only
be done on MY 03 vehicles as of the following engine numbers (Omission of
pipe- cat):
11 133 945 - MT without check control
11 131 764 - AT without check control
11 133 885 - MT with check control
11 133 302 - AT with check control
On vehicles with engines prior to these numbers (with pipe-cat) the
defective EGR valves have to be renewed.
FunctionalGroup: J - Engine
Complaint Group: 19 - Poor Engine Driveability,20 - Poor Performance
Trouble Code: P0404,P0405