TDI quattro esp warning light and 00550

[tdii]

Hi all, have a 2002 2.5 tdi quattro, running rough won't rev, clouds of smoke comes up withh 00550 fault code and the ESP light is on all the time, any ideas?

[scone888]

yeah mine did exactly the same and had the esp light on . is the smoke grey and is the engine pincin if so am sorry to be the bearer of bad news it was the diesel pump . i went to deisel bobs and he sorted it but your lookin at 700 squids better than audi that wanted 2 grand . deisel bob does know his stuff . when i went in to pick mine up 2 more 2.5tdi audi s had come in for the same work. look for the thread about diesel pump the links there . hope this helps

[MikkiJayne]

That code means an injection timing problem. The pump is firing at the wrong time and the needle lift sensor on injector 2 is reporting this to the ecu which shows a fault.

Is it accompanied by any other codes? If so then it could be electronic in nature. If not then its probably mechanical.

Mine did exactly the same when this happened:







Ran rough, went in to limp mode and wouldn't rev over 2k. The variation allowed by the belt wobbling around allowed the valves to hit the pistons which smashed most of the lifters The engine is now in the kitchen getting rebuilt.

I would be very wary of driving it like this, just in case it is mechanical like mine. It only takes a couple of degrees to throw this code up I think, but there is very little room for error in the physical timing too.

It could be the pump ecu, but from my research that tends to throw additional codes as well as the 00550.

I'd start by removing the plastic belt covers and make sure the belt is tight. I could see loads of play in mine so it was easy to spot.

Good luck!

Mikki

[scone888]

holly **** its not just me havin some bad luck . good advise though . i thought my pump seemed bad but thats real bad

[tdii]

Thanks to you both for the above advice will get it checked out straight away ! (without driving it)