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Well I've been through every connector and confirmed every ground. Tested every switch. No issues. It must be the display.

I just got in the garage tonight. I’ll start checking all connections and verifying grounds. Thanks for taking time to reply. ill update my findings here.

Dealer replaced engine and now the display has CEL and P Brake lights on and Pbs or Pb5 or P65 displayed. I purchased a used unit and it has the same issue. I don't want to buy another if there is another underlying problem. I read post from 2013 and 2014 on HCS 1 person replaced the display...