Your check engine light is on all the time engine is running your temperature gauge does not move when driving the car and your cooling fan continue to run for several minutes after turning engine off?

Check your coolant level, FIRST. If it's ok then let the vehicle run for a few minutes and check to see in the radiator is warm by quickly touching your hand to it (shut the vehicle off first and make sure your hand isn't anywhere near the fan! The electric fans can start even when the vehicle is off!). Warm means your water pumps working and your thermostat isn't stuck shut. Cold means one or both aren't working.