I have recently installed a t3/t4 on my aww 1.8t and installed a 4bar fpr and 440cc injectors, I adjusted krkte for the injectors. I still have to figure tvub, my question is, I am throwing a code for the upstream o2 sensor. I replaced it but am still getting a code for it, it wasn't there before the turbo install and all of the wiring is intact. Is there any tuning aspect I am missing? I don't know if it matters or not but I am still using the stock maf for the time being.  

The trouble code from vagcom is -16514 - Oxygen (Lambda) Sensor B1 S1: Malfunction in Circuit
P0130 - 35-10 - - - Intermittent

Thanks for any input.