I don't know if you got an answer to your question,but you have a bad VDU,Vehicle Data Unit,and when they're bad,they send an erroneous signal to the gauges. There is a repair for them,resoldering or you can get a replacement for about $450 from a Freightliner dealer. very easy replacement.
'01 Tradewinds 7390 LTC
2011 Jeep Liberty