Maic, was the alternator regulator causing the issue? I started getting 2E8B - IBS sensor missing after I replaced the alternator regulator and leaving the battery ground disconnected for a few days. I also get 2E85 electric coolant pump missing but only once in a while. Just curious if the alternator regulator could be causing the issue even though it was brand new. I already replaced the Battery Ground and IBS sensor already but 2E8B keeps coming back.