check engine light is on and stays on.
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2008 Mercury Milan Question: what is the cause for the check engine light coming on?
Answer #1juanjo July 27, 2011, 14:17Rookie
Go to Autozone or Advance autoparts and ask them to check your engine light with the scanner,and then google it to see what the code P#### means
Answer #2darlajcole May 23, 2014, 10:25Rookie
My thermostat was leaking antifreeze...easy to check if your reservoir is slightly low, but not enough to cause a change in temperature guage. Cost $385 to repair at the local ford Dealership.