All Got a lambda sensor error code on my 180bhp AJQ engined 1.8TQS, but is there only a pre-cat sensor on this engine, or could it also have a post cat one as well. I think early cars only had the pre-cat. Can anyone confirm this? Cheers Jason. Don't want to buy the wrong one as I'm gettin some lean running at higher revs and burnt out a set of plugs. Ars3.