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I had this issue during one of the rare times I had a passenger in my truck. I had a pressure switch code according to the computer. All I had to do was clean the connectors out and restart the truck. Code went away and has never come back.
At my independent actually, but same thing. He in fact told me to clean and re-seat the plugs and sure enough that fixed it. I have not yet checked to see if the Hawkeye can read those, but I think the answer is no.