Kitchen sink faucet is clogged or internal cartridge has failed on cold side
It being RV junk probably NOT serviceable like a residential faucet.
(Remove handle, then unscrew top and pull internal cartridge)
Probably doesn't even come apart.
You can disconnect hot/cold lines ...swap them and see if problem changes to HOT side.
Better yet.......replace that RV Junk with a quality residential faucet.
I do that with every RV.....kitchen and bathroom. Then IF a problem I can service/repair with parts from any hardware store.
As Barney Fife would say "Nip it, nip it, nip it in the bud!"
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31