Ok so I have to take emissions by the end of Sept. I am throwing code p0135. I have s2s2 cams, s2 intake manifold, itr pistons, smsp header and other bolt ons tuned on neptune with a p28 obd1 ecu. When i plug in my obd2 ecu I throw this code. I tried using one of my friends o2 sensors, this did not work. I have searched but I could not find anything helpful. Anyone have any ideas?

 

Anyone please