Fulwild

New owner of 2010 PTT. (49K Miles) Check engine light (CEL), (yellow warning) x2 days
Scan showed multiple, mostly low voltage, faults(25 total in 10 areas). Battery was original with March 2010 build. Battery was recently recharged as maintenance after purchase using CTech 7002
Among the faults was:
P0597 Thermostat driver Which is diagnostic for either a bad sensor connection or faulty thermostat

After replacement of battery with Duralast Platinum AGM (AutoZone H8-AGM), the CEL returned and scan returned 2 fault codes. P0597 again and

U0422 Ambient Temperature via CAN 1) Gateway control module incorrect or 2) Message via CAN defective or missing

All engine temps seem normal to me 195 to 210 water, ~195 oil, heater maybe low output but it never seems to blast hot air on auto. (50F outside) so not much heater action.
Proposed courses of action Replace thermostat (948 106 034 01)
Questions:
Should I replace the water pump (948 016 033 01) as its off anyway to get to the thermostat?
I have seen mention of cracked/problematic thermostat housings if housing is original plastic? (948 106 080 01 ?) I'm assuming I should replace with (948 106 080 02) (aluminum?) is this proper or overkill?
Any other hard parts should replace while I'm in the area? Plastic radiator drain plug? (is this a thing? part#?)

Parts list:
948 106 034 01 Thermostat and Gasket set (PK970V6THERMO)
948 106 707 00 Thermostat o-rings included in above
948 106 533 00 Water pump gasket included with above and below
948 106 033 01 Water pump with gasket
948 106 080 02 Thermostat Housing
948 106 124 02 Gasket for thermostat housing

Fulwild

Not sure if I have the right part for the thermostat housing.

DogWood

you doing the work yourself Fulwild?

PTEC

Early 2010s had lots of thermostat issues. I suspect you'll pull out an original .00 part. I'm kind of spacing right now but in order to access the electrical connector on the thermostat you may have to remove the intake manifold, or possibly the throttle housing at the least. If you plan on replacing the thermostat housing (which is a good idea if you have the early style part with the glue'ed in pipe) you will definitely have to remove the intake and the high pressure fuel distributor. I would not bother replacing the water pump. I have worked on hundreds of these 970 and I have not seen a bad water pump yet, either noisy or leaky.

Fulwild

Hi DogWood. Thanks for you question. I already reality checked my ambitions. I was considering trying to do this until I realized that I should probably replace the thermostat housing. At that point it looked like it would be taxing my available resources.
I can go to the dealer and have no issues with them other than costs. I prefer taking it to my regular German car mechanic but he is a relatively small operation and to the extent I can order the parts it can lower everybody's stress and gives me the chance to increase my savings through parts shopping. We both tend to replace parts as preventive maintenance so PTEC's advice re the water pump is very helpful.
My long term mechanic does not have a significant Panamera Customer base.