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Car was running fine last week when I put a new battery in it, went to start today and car starts then immediately cuts out and the oil light flashes, I've over ridden the immobiliser with the fob and tried a different key but doesn't change anything, any ideas where to start?

 

First thing i thought of was water ingress into the ecu after all this bad weather, hope not.

 

TIA

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Ok so an update on this.

 

I finally found my cable and plugged it in to vag com and got an error that the immobiliser has blocked the start of the car.

 

I disconnected the battery and shorted it out then connected it back and and hey presto it started, only thing is that when i turn it off then on again im back to square one.

 

Any ideas why this would have happened since fitting the new battery? 

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