CgN

Hi guys.
I am new to this forum
recently I have purchased an audi a6 c6 3.0tdi quattro automatic.
car looked honest and the e gine was purring nicely.
no service history.
The price was decent for a lot of spec so took the bite.
after a few long drives and pushing it harder I've got the glowplug light flashing and the message " do not exceed 2500 rpm".
ond scanner came up with the fault code in the title.

Switch the ignition off, it goes away and it does it again once exceeding 3700 rpm in 4th gear.
Replaced the oil pressure switch, not sure I've got the right one.
Read few threads on the forum and after a big sevice, took the sump down and ive seen that the oil pump has been replaced with one Gates, but no pressure valve in the sump.

Any ideas?

Thanks

jonzie77

I was intrigued enough with your problem that I looked into it (as you clearly have). Perhaps you did not come upon the following which sounds like a similar problem to yours: Ross-tech Link

CgN

Hi Jonsie

Thanks for looking into this.
I did come across that thread last week.
I did convinced my mechanic friend to have a look and looking at the schematics of the N428 valve, it seems that it is actually in the sumo but it is siting in the top ...silly mistake.
Once the sumo is back on will have a go at changing the valve from the top.
I hope that is the problem.
anyone else. Please feel free to share your thoughts and your experience.

CgN

Just an update for others which might have this problem.
I have changed the solenoid, N 428 valve situated in front of the engine below the accessory belt. Problem solved.

jonzie77

Thanks for the update.