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Vauxhall Astra Yellow Engine Light

Hi There

I have a Y Reg Vauxhall Astra 1.6 Automatic with the yellow engine
management light on permanently.

The only symptoms (other than the light) seems to be very poor mileage
(i get about 250 miles with a full tank).

I have done some research on this matter and tried a few things
including:

1) Disconnecting the battery to reset the ECU - This turned off the
light but it then came back on after 10 mins of driving.

2) The paper clip test - In order to get the error code from the ECU I
connected a paper clip to some of the pins, however the diagrams show
on the web page were not similar to mine and the test did nothing
regardless of which pins I used.

3) Scoured the Haynes manual for ECU checks - This seems to point to
the EGR valve however without definate evidence of a fault I am
unwilling to start messing around.

Has anyone come across this or know how to peform a suitable test to
give a specific fault?

Thanks

Longman

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