I have just bought a Gendan fault code reader and plugged it in to my 1.9 tdi octy and was pleased to see that there was only one fault code logged . The code in question is 17970- quantity adjuster n146 upper stop valve. I have cleared the fault and to date it has not returned. Can anyone tell me the cause of the aforementioned code?

thanks in advance Dave.

Can't help you but can direct you to this link 17970/P1562/005474 - Ross-Tech Wiki

Hope that it doesn't return. I encountered this code on a V6 diesel Audi that wouldn't start - it required a new fuel pump at not much change from a £1000.

quote=fordfan;1693663]Hope that it doesn't return. I encountered this code on a V6 diesel Audi that wouldn't start - it required a new fuel pump at not much change from a £1000.

:eek::eek::eek::eek: eek,i hope not.I dont know how long the code has been logged,but i have no cel light and the car runs superbly with no starting or performance issues. The only time it has nearly stalled on tickover was when i was adjusting the tuning box on my car because you have to turn the adjuster until the engine hesitates/stalls,and then turn out the screw.Could this have been logged as a fault even though it did not put the cel light on?

It's a bit coincidental as that Audi had a tuning box as well. It belongs to the wife of a dent removal man who we have been using for years at work. I told him that it was a bit greedy having a tuning box on a V6.