Join Date: Dec 2005
Nominated 2 Times in 20 Posts
TOTW/F/M Award(s): 18
Thanked 1,103 Times in 942 Posts
The fault is still present,then.
If you have changed the upstream Lambda sensor and it runs better,but the light is still on,then there has to be a fault somewhere.
Have you had an emissions check done?.If not,then it's the next thing I'd do.If the cat is damaged then the downstream sensor will pick this up and throw the light on.
It could be the downstream sensor is damaged and telling lies,or it could be the cat that is causing the problem.I'd have an emissions check and code read done and go from there.
I'd rather push my Alfa than drive a BMW....
Currently in Lagdti's garage:
2004 Saab 9-5 HOT Aero and a 2001 Audi A3 1.8 Turbo