I never figured it out. I had problems off and on the whole time. I have an L67 throttle body on now. when I put the L67 TB on, I had a code for tps, but it cleared and hasn't come back in 6 months or so. I would give it a while and see if it goes away, but if not, just put the L67 back on. As much as I like the throttle response of the N*, the hassle wasn't worth it.