have gotten 2 low engine coolant warning in the past 2 days. checked the coolant levels and they seem fine. '10 RRS HSE LUX with 4K miles. when i shut down and restart, the warning goes away. i thought it was gone for good, then it came back again. now it is gone. i'm assuming a faulty sensor of some sort, and will bring in to have them take a look, just curious if that's one of the common '10 bugs... thanks