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already done all those things, it was a vw diognostic tool that was used, the people in the garage have no idea what it is, they haven't came along a fault like this
the wiring is spotless, its all been checked, all the sensor plugs have been checked, ive changed the sensors on the engine just in case one was a bit faulty, there's been hours spent trying everything, the light stays off for hours even when its being driven then all of a sudden it comes back on, its proper doing my head in, is there a sensor im missing somewhere not on the engine, ive searched the internet and can't find anyone who's had the same problem
i cant find the receipt off the garage, i thought there were 5 sensors they changed, but not sure, all i know is they changed every sensor on the engine and checked all plugs and cables to see if they were loose or damaged, it cost a fortune and in still no better off, someone said it might be a fault in the instrument panel, i just don't know but i need to get it done so i can sell it
the other thing i cant work out is if there's a fault why doesn't the engine management light come straight on after its turned of,
the car drives fine, fuel economy is very good, using more fuel is the first sign of the fuel oxygen sensor, plus that would have been picked up on the diagnostic, all obvious faults have been checked this is why its so puzzling