Hello i'm Samuele from Italy exactly near Florence.
My JTS (i'm first owner from may 2002) have a problem with warning light.
With examiner fault codes are p1172 (Lambda adaptat. 2 (additive) above upper limit ) and p1173 (P1173 Lambda adaptat. 1 (multiplicative)).
I feel car good no problem.
MAF seems good but is difficult to say. I have changed precat lambda for safety.
I have read the problem with lambda's connections so i have sprayed it.
This problem appears sometimes also when car was stock. Now have direct kn induction, then mainflod is 4-1 exausth, sport cat 200, sport rear exausth; all by cecam. I think that these thing are not important for my problem.
I think MAF but i can't change a lot of thing without certainty.
Thanks for attention and sorry for my italian english