Emmissions + MOT

AmDaMan

AmDaMan

AmDaMan

Soldato
Joined
18 Oct 2002
Posts
4,020
Location
Wellington, NZ
Right my car went for it's MOT and failed on some little things (headlights of of alignment, mudflaps too low etc)

Garage sorted these and changed the oild, filter plugs etc and it's still well over (like 7% i think he said) :(

What could be causing this?? Only thing I can thing i can think is running rich or a dodgy cataclyic converter maybe?

Luckily I don't have to pay for the 3rd retest but I'm sure the bills are already quite high now :(

Its a 10 year old 1.4 clio as many of you know!
 
The filter is ok, I cleaned it before it bent it. The exhaust doesn't have a leak as i know of. What does a lambda sensor do? I use redex on it regularly too.

Mine also has a cat. Just don't understand why it was so much over!
 
I havn't seen the sheet but the co2 was at 7% iirc so a considerable amount.

Where is the o2 sensor located?
 
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