Good to know. I've started documenting as well, in fact I'm driving to Austin (from Dallas) and back today and I'm curious to see how it goes.

 

new owner of a 2020 110 se just bought it ,cpo from dealer. drove it home. parked it. started it up an hour later and got low coolant red triangle. should i be pissed?

 

First thing to check by yourself are the auxiliary coolers in your front bumper left ( and also right on the P400).
Check for coolant residu there, it's a known issue for the first year L663.

 

Had that exact leak on our 2023 plus another coolant leak developed later from the lower hose that connects the engine block to the radiator. No coolant leaks yet on our 2021 and you would expect it to be the other way around.

 

i will take it to dealership, i did purchase additional warranty, but its still under jlr warranty for another year,its at 37k now. i will look for coolant. i dont smell it. my 08 range rover hse takes the pink coolant. what color does the defender take? thanks.

 

is your reservoir empty?

 

the resevoir was empty, i topped it off with (oat) coolant. my guess or hope is that when the dealership cpo'd it they didnt run it out after coolant replenish and when i drove it off the lot it burped it? i will keep an eye on it and see if its holding.

 

that is possible but I would check it once a week a take a pic to observe any drops and establish a timeline of how much it’s dropping.

 

2023 P300 40k mileage.. on our first road trip to the west cost I noticed a low coolant warning when accelerating while entering the interstate and also on kick down when passing.
Took the truck to Riverside CA JLR for unrelated issue. Left there with a full coolant tank. Issue of warning light and symptoms never cured. Now almost ever time upon starting, the coolant warning locked on the dash. I checked the pressure tank and it reads Max, and has not shown any loss for weeks.
Could there be air in the system ? Or should I run the truck with the pressure tank cap off to bleed air ?

 

in my case it had turned out that the hose from the turbo cooler to the rad had a leak. that only showed up while accelerating hard or when the turbo boosted. while at idle or just driving at speed, it wasnt an issue as much.the dealership replaced that known issue with a new type of hose and its been trouble free since then. there are three radiators to choose from and lots of hoses so it possible that there is a tiny weep from a hose that doesnt show up even under a pressure test.