Hi , im fitting a 3 inch downpipe and decat to my octy , is it adviseable to connect both lambda sensors then map out , or fit blanking plugs and remove lambdas ? Will it affect the running if they are removed ? Thanks

• mines connected with a lambda sensor adapter i get no lights on dash.   but you will fail mot regardless what u do 

mine are connected and mapped out. sai mapped out too. I have managed to arrange a way to renew my MOT next month, so that little problem is sorted