So, I've recently started popping up a random P2181 performance malfunction in cooling system.
It's so random and shows no signs of any other problems that I'm confused. Temp gets hot, stays exactly where it should be, 200. Never gets a tick hotter, or even close to above 200. Air works, heat works fine. No loss of power. It only seems to come on when I really put my foot down.
I've done some searching and seen the Coolant temp sensor for ~36$ from ECS so I plan to replace that and hope it fixes it, but, I've read that improper coolant mixture can also throw this code? And if it was a thermostat sticking, wouldn't it take a long time to heat or overheat?
I really don't want to get into replacing the thermostat and housing as I've seen that they're ~400$ job, and I really don't have that to blow. Thanks in advance.