Hi this my first post and am looking for advice as why the engine management light keeps coming on my focus 1.6 petrol 2002 model after having problem diagnosed as lambrda sensor failure and after changing both sensors light went off but came back on after a few days car is running spot on the very good mpg only engine managment light indicates a problem

Thanks for any help
Dave

 

Do you have the number of the fault code read?

 

Are you sure the Cat hasn't failed that O2 sensor trouble codes as can air leaks, running rich or lean etc

 

Don,t have codes but will try to get them

Thanks
Primark31

 

Now that you mention air leaks i remember garage said something about them so maybe the cat is suspect

Thanks for help
Primark 31