Welcome to iRV2.
The pump switch , may be defective , so probably replacement required .
As far as the tank readings are concerned.
Does the panel also include a propane, and fresh tank, level check ?
If so does those readings seem to be accurate?
Could be the whole panel , or it's ground wiring could be in trouble.
On late model RV's I haven't heard too much about tank clean out, required to clean the level sensors , it's nowhere near as big a problem as it was on older RVs.
I used to get a box of denture cleaner at Costco , and put half the tablets in the black tank & half in the grey , with a 1/4 tank of water in each, and go for a 15 mile drive then dump the tanks . Others report just using Dawn , dish soap with good results , I don't know how much though .
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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