Hi everyone!

I have a vw golf 1.4s, petrol. the engine management light came on so took it to garage! ..mechanic plugged in the vagcode reader machine and 1 fault found !

which waS:::

B1-S1 NO ACTIVITY (4086)

we looked in the book but couldn't find any further info....?
any1 have any more info on this?

Any help is appreciated.


Many Thanks.