Hi, can someone please urgently help me with a problem on my Fabia I Comfort Auto?........

Last Friday found car dead with flat battery just 3 hours after driving it no problem.

Thought the battery was duff but it charged up fine.

Four hours later - completely flat again! Then noticed the fuel pump was still whirring.

It runs all the time - even when the car is switched off and locked!!!

Found taking the fuel pump fuse out stopped the whirring and stops the battery going flat so now taking it out every time I stop!

Found the relay that controls the pump - number 404 - and thought it might be sticking so changed it for a new one.

But NO! Same problem.

I can't find anything like this on a search of forums.

Please help me out. Many thanks

Edited 3 March, 201016 yr by nicholas28

It's another relay then, or a short somewhere

It's another relay then, or a short somewhere

Thanks. I've tried removing all of the other relays fitted to the board behind the fusebox one-by-one and none of them stopped the fuel pump running. Do you know if there are there some relays somewhere else?

Short? I did think about that but wouldn't it need to be a +12V short ing into the fuel pump supply somewhere to supply power? When I've come across shorts on previous cars they have been +12V to ground - running the battery down but not powering anything up in the process. Hmm. Anything is possible with VAG electrics though!! ;O) Any likely places to look for a short? Many thanks )

Disconnect battery and have the car recovered to a garage, this fault is a severe fire risk. It will need a scan to pinpoint the fault. It could be a wiring loom short, or faulty ECU.

Have now had a full VAG COM scan done and found no failure codes at all! I'm not using the car until this is sorted but thanks for your concern. I'd like to check out as much as I can before taking it to a dealer so if anyone can suggest more things/places to check that'd be great

Turns out to be an intermittent fault in relay 167, whatever that does!

The return spring inside the relay had popped off its mounting.

All fixed now and satisfyingly inexpensive

Thanks for posting the fix IIRC that's the return line relay, so would explain the constant pump running.

+10pts for me being right