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[pinky]

My engine management light keeps coming on, it will come on for a few days then goes off for no apparent reason, i have had it diagnosed and the air flow mtr was changed, it was ok for a while and then on it came on again, this will be about the third time i have had it tested in about as many months. They are now going to test the cat convertor and have been advised i need to get a new cam belt but they do not seem to know exactly why it is coming on, any suggestions would be much appreciated.

[feeutfo]

could this be the pre cat issue, anyone?

What is the EXACT fault code they found with tech2?

[PxMetro]

Unlikely to be Cambelt, but others on here may say different! More likely connected with emissions. From what I understand: the pre-cats could be on their way out.
My light has been on constantly for several months now, but sailed through the MOT emissions test last week.  :-/

[vc009]

hi, I just had the cam belt and tensioner and the water pump changed on my omega 2.6 2002 auto lpg. For some reason the moment i switch the car on to gas it starts shivering or rough idling and the engine management light comes on. This did not happen prior to me sending the car to the garage for the belt etc. the moment i switch it back to petrol it idles better but is still shivering slightly. the moment i drive it its perfect. It only shivers or idles slightly rough when in neutral or in park mode. According to the engine code it says misfire cylinder 1. My mechanic reckons since the car runs on lpg the plugs are probably on their way out and i need a new set of plugs. is that true or iam i looking at some other expenditure
Any help would be appreciated thanks