key fob issue now no light on dash engine turns over

[Steve Haslam]

Hi all

2008 audi A3 - car was fine yesterday no issues and both sets of keys used to work - wife took normal keys out with her so went to unlock car with spare set but found fob battery flat. Changed fob in spare set and found it would only work once to unlock new battery is ok - reprogrammed the normal way so car now locks and unlocks with spare key. Went to start the car and no lights on the dash but everything else works - if you start the engine it will run for 2 seconds dies. Wife has turned up and tried the normal set - doors lock and unlock but has the same issue as spare set ( no lights on the dash and engine will run for 2 seconds) tried the hold the unlock button and turn ignition on then off then release. Anyone got any ideas ? Thanks

[Steve Q]

I'd recommend a diagnostic check to see if any fault codes flag up. Could be an issue with the imobiliser