error 18265-P1857 help

hi guys

i was driving my car last night when I came up to traffic lights and stopped. the car juddered a little then the engine shut down and will not start again. the AA don't know what it is and I was wondering if anybody could shed a light on the problem before it goes to the garage on Monday.

my car is a 2005 (55 reg)A4 Avant B7 and the fault is as below

Address 03: ABS Brakes Labels: 8E0-910-517.clb
Part No SW: 8E0 910 517 D HW: 8E0 614 517 AK
Component: ESP8 front H04 0120
Revision: 00000000 Serial number: 00000000000000
Coding: 0004401
Shop #: WSC 06325 000 00000
VCID: 2855E0E09B0DDA5EFC3-807D
1 Fault Found:
18265 - Load Signal
P1857 - 000 - Error Message from ECU - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 40
Time Indication: 0
Freeze Frame:
Hex Value: 0x0000
Hex Value: 0x0022
Hex Value: 0x0028
Hex Value: 0x0198
Hex Value: 0x0001
any help will be appreciated

and the engine is ??
what happens when you try to start, all dash lights or not, engine spins or not etc...
more info.... needed...

sorry engine is a 2.0 tdi and when I try to start it the parking brake does flash. all other lights are normal. the AA fella put some "sniff" in the air intake (I guess its a can of fuel) and it started but as soon as he stopped spraying the engine shut off again.

had you just filled up with fuel ?

I filled up the night before and it had just over 1/4 tank. I drove for 230 miles yesterday with no problems and it happened when i went to the shop last night. About 2 miles

probably not that then. so many things it could be though, timing belt being one of the worst.

My timing belt was changed about 8 month ago. But i have always thought it was running a little rough from the change but the garage said it was fine

one thing i have noticed this morning is the EGR valve is making a buzzing noise and it has flattened the battery. it is as if there is contant power going to it without the key in the ignition!!!

Sounds like the egr valve is stuck open dumping exhaust gas in the inlet manifold.are you sure its the egr or manifold flap.

I am sure it is the EGR valve as i have had it off and cleaned previously. The sound is like a high pitched noise if that makes sense