service engine soon

[snakebite]

This morning while out driving I had the service engine soon light come on.I have just changed the oil plugs and leads.Car now has 31K on the clock,what brings the light on eg Knock sensors Oxygen sensors or is there a reset I have to do on the service or do you think it will have to go to chysler.Do I need to stop driving the car.

[snakebite]

Thanks for the help Nad just tried to get the code but had no luck I think this is because the light has now gone I will try if the light comes back on

[snakebite]

CAR RUNNING ROUGH AND SMELLING OF PETROL SO I'M SURE THAT ITS MISS FIRING SO I HAVE TWO PLUG LEADS WRONG OR A FAULTY PLUG AS THIS WORK HAS JUST BEEN DONE.LIGHT IS BACK ON BUT STILL UNABLE TO GET FLASHING

[snakebite]

THANKS I SHOULD BE ABLE TO SORT IT OUT WITH THAT INFO

[snakebite]

still having proplems took it to chrysler to read the codes 1) oxy-sensor on passenger side going to ground 2)also running rich. Got them to look at o2 sensors seem ok also got them to change plugs.Still runing bad but they seemed to think that passenger side cat was in a bad way causing the engine breathing proplems and also causing rich mixture.They thought this because white dust was coming out of the exhaust.I guess next job is to remove cats and replace oxy-sensors.(cats are 3" stainless steel from jonB only 6000miles on.Your comments or ideas please

[snakebite]

The lastest news is that the 02 sensors seem ok and have been cleaned (no service light on )but the right hand side cat was blocked.This would also make the engine run rich on one side.The work shop next to mine is Tig welding a 3" piece of stainless steel in place of the cats ( had to buy 6m of it so plenty left over )so hopefully up and running tommorow.