1/4master

i've been getting p0157 (HO2S cicuit low voltage B2S2), p0161 (H02S heater perfomrance bank)ever since my pulley (UD and alt) and shiftkit install. i have stock exaust manifolds and cats etc . . . i'm thinking the f--d up the alt pulley install or the tranny shop knocked the crap out of the b2s2 sensor when they were in the tranny. any ideas out there? thanks.

john <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />