[OU812]

I no nothing about the H2 codes / lights. However, on my Ford Explorer I had installed a CAI which I believe is causing my check engine light to come on every once and awhile, but it too would after awhile reset itself. I have heard that some can clear themselves if the fault clears (accept I don't know the accuracy of that statement). On others I know for a fact that you can do things to "manually" clear them, e.g., cycle the ignition key like 50 times. On my Ford, I don't know which is causing the light to reset. I do not cycle mine 50 times, but I have never counted. I have bought the ScanGuageII based on a Group Buy, but the light has not reappeared since I bought the thing.