yellowbird

last summer I bought a jantzer ptb,about 3 weeks later I get a SES code po121,bad tbs senser.took It to autozone 3 times to erase the code,finally I called jantzer and ask him wtf was up with the tb.I explained to him It was throwing the code NOT AT WOT>It was doing it at normal driving.I replaced the senser last fall,but just before I put It up for the winter It coded again,so I need help here on what to do when I bring it out in a few weeks,jantzer had no clue,He kept telling me to build up the bump stop,again,ITS NOT DOING IT AT WOT>!!! help.!!has anyone ever had this problem,and how can I fix it.how is it possible to throw that code while not going to the wot. thanks.