#1: gti 138 o2 sensor Author: scoop, Location: cairo,egyptPosted: Tue Aug 21, 2012 8:34 pm ---- i disconnected the green o2 plug to see any difference or a check engine light and there was no difference even with performance, why is that??
#2: Re: gti 138 o2 sensor Author: 206boyracer, Location: Sunny CornwallPosted: Wed Aug 22, 2012 1:41 am ---- All you will possibly notice is increased fuel consumption. My car failed mot on its emissions a few years ago. When the garage went to put a new lamda in they noticed that the one already fitted wasn't even plugged in. I never knew any different. The car drove just as it always had and I had no engine lights come on.
To be absolutely honest I didn't even notice much difference with fuel once it was plugged back in.
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