Anyone have any ideas on what would be causing these faults. I pulled them off my gap tool I drive a 2016 LR4 SCV6


EDIT..... I ENDED UP REPLACING THE THERMOSTAT AND THE FAULT WENT AWAY

 

I have a 2016 LR4 as well. Here are my comments on the codes:

P0128-00 generally relates to a thermostat failure. Maybe check the electrical connections of the thermostat and temp sensor just below the thermostat. Otherwise, it seems the thermostat should be replaced.

U0447-00: This relates to your gateway module and dual battery distribution system. I received this error recently while running temporarily with the aux battery removed. Could be a dead aux battery or a loose connector somewhere at the gateway module or dual battery junction box.

P0483-36: The fan has a clutch control circuit and a speed sensing circuit. Fan speed is controlled by pulsing the control circuit, which turns the clutch on and off to control speed. If the speed of the fan detected on the speed sensing circuit is different than expected for the given pulse width on the control circuit, you get the P0483 error (at least that’s my understanding of how it works). This can be caused by a fault in the speed sensing circuit, the control circuit, or the fan clutch itself. I had the p0483 error when I was under warranty, and the dealer replaced the fan. That fixed it for a while, but it has come back and gone away again a couple of times. I have not yet determined the cause in my case.