Hi all , ok so what i know about cars , they have four wheels ( five with spare ) and a steering wheel and they get me from a to b !! u get the idea .

ive a focus ghia est 2.0 pet

ok so i keep getting this light coming on , its the engine block one , to do with the emissions system apparently.

my mechanic, who is a damn good bloke, and i consider to b genuine has had the car in a couple of times and changed a couple of sensors after reading the faults on his , fault reader ? , and repaired a split rubber pipe but each time the light comes back on after a couple of trips. i dont use it much mainly weekends and it doesnt go far . but its annoying! he says it shows more than one fault so were starting with the cheapest bits to replace before thinking about cat converters and stuff. im sure im not the only one so has anyone got any suggestions on causes ? or what theyve had to do. the car seems to run fine but dont like driving it around with light on much , as im sure its on for a reason.

Thanks in advance for any replies. Happy motoring.

What's the fault codes

as above get the codes from your friend as one code can cover many causes, just because it may come up with a sensor code it may not be the sensor itself.

If you want to read your own codes, have a look at my signature for "got an error on your car" you can keep this handy for the future!

Many thanks for the replies . I'll get him to write down the codes when I next see him and I'll post them on blog . In the meantime the light has actually gone out . I usually fill up,at the supermarket purely cos it's near and cheaper but yesterday I filled at a shell garage and today the light has gone out ! I have been told that fuel from the supermarkets isn't as clean and has a habit of causing lights to come on ?? Also been told to fill from a non supermarket garage say every third fill ?

Not sure if there's any truth in that but it seems a bit coincidental .

Just have to keep driving to see what happens . Would it follow that no light on means nothing would read on a fault finder ?

Thanks again

I am one of those who swear by not using supermarket fuel, there are long conversations that could be had :p

It sounds like your fuel filter could have been clogging up which could have triggered a lack of pressure and thus an engine light coming on!