Hi all ,
have a 03 a4 avant 2.5 tdi quattro with 80000 on the clock which keeps going into limp mode (sounds like a tractor esp light on). Light goes out sometimes when driving and also after being switched off and then left for a couple of mins..Can seem to coast about for a few miles before it goes back into limp.
Fault codes read 00550 017 sporadic fault. Any ideas of what i can check ,guys at the garage say the pump could be stuffed .