I'm still working on mine. I checked the connections as well, as well as some others. The problem seemed to go away for a few weeks, then it started up again. I read that if you replace any sensors you should disconnect the power to let the ECU reset and resample to adjust to any changes. It may have been compensating for a component you may have changed, and needs to be reset to work with the new components. Just a thought. Did you turn your IAB sensor over like Rerun suggested?