2nd lambda sensor sleeved

[minimanspk]

I have fitted a 4-1 manifold to my 1.1 and its now loud as fuck and was faster by a fair bit but now the engine management light is on, came on after about 30 mins so im thinking that this is the second lambda am I right. And also I was goin to buy a sleeve off of gmc motorsport but then thought would it work if I just disconnected it at the blue plug, would my engine management light go off and would it come out of limp mode.

any help would be appreciated

sorry if I have posted in the wrong section I am going to post it in problems and queries aswell

[jeffchiz]

no unplugging it wont solve the problem as the ecu still wont be getting a reading lol only way is to sleeve it, can get cheaper ones off ebay not sure if there's any difference between the more expensive GMC