I've read every post regarding this code and most have made the thermostat the culprit… Symptoms typically include low mpg, low coolant temp, and slow warmup...I had all of these and replaced everything in the coolant system and I am still getting the code except now I am getting the best Mpg this car has even come close too...Like 30mpg in the city and 35 hwy!!! I do enjoy this gas mileage but understand it is probably at the expense of something else so can anyone diagnose what the hell is going on with this car please and thank you