hello everyone i need help with my 1.8t a4 it cant pass smog im getting a p1136 code and ive gone to 4 mechanics and none ove them know wts wrong plz help

 

How is the car running any other symptoms.

 

the car runs great i just cant seem to find the problem i replaced the MAF one of the O2 sensors(the one next to the engine) installed the stock air box because it had a cold air intake and tht is the runs and drives amazing its just tht dam check engine light keeps comin on

 

Have you checked for any intake and vacuum leaks.

 

thr are no vacuum leaks ths the first thing i checked im not shure about the intake tho ill check it when i get off work but im pretty shure its good since i had it checked twice by two different ppl they told me it was fine

 

idk if it could be the other O2 sensor by the cat so im going to the auto parts store to se if i could find one