I would call the customer service for HUM first but if it doesn't clear I heard pulling out the HUM and re insert might clear the error codes but the last resorts is remove the battery cable for about 20 minutes, but in doing so you delete all history that could be used by a mechanic to further fix your problem. I would not do the last resorts method unless absolutely necessary. I have a error message in mine right now and my mechanic is out driving it around for about 10 miles then hopefully it will reset on its own, if not I will unplug and reisert and check it out one more time and if it's still there I am calling customer service and go from there, could be something else that's causing it to not clear. I hope this helps out a few people who have this same problem. This is in no means the solution but it's a start.
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