See "Related Questions" below for the same discussion in the Windstar category - equally applies to the Freestar/Monterey
The computer system needs to be scanned to see what code is causing the light to come on. The code will tell you what sensors or other components that the computer thinks is bad.
Usually a problem in the emission control system-have vehicle scanned to determine the problem
The check engine light comes on when the ECU detects a problem with the emission system in the vehicle. Have the ECU scanned to retrieve the code that will tell you what part of the system is being effected.
Usually indicates a problem in the emission control system. Have vehicle scanned to determine the problem
The check engine light comes on when the ECU detects a problem with the emission system. To determine what the problem is you need to have the ECU scanned with an OBD2 scan tool. The code you retrieve will tell you where to start looking for the problem.
The check engine light comes on when the ECU detects a problem with the emission system. The maintenance required light comes on when some maintenance is required on the vehicle such as an oil/filter change.
Evaporative emission leaks, EGR, misifireEvaporative emission leaks, EGR, misifire
The check engine light comes on if a malfunction with the emission control system has been detected - it can stay on - or may go out and come back on in the future
If your check engine light comes on and STAYS ON, a malfunction has occurred that is effecting the emission control system If the light comes on and then goes off , occasionally , the malfunction has corrected itself If the light flashes on and off at 1 second intervals , a spark plug misfire has been detected
The check engine light comes on when a problem with the emission control system has been detected - scan the vehicle for trouble codes in order to diagnose and repair the problem
Could be as simple as the fuel filler cap installed incorrectly. Usually a problem in the emission control system - have vehicle scanned to determine the problem
You should ensure that you have had any needed repairs done to your vehicle when the check engine light comes on. If you have an ODB reader and already performed the repairs, you can use it to reset the check engine light, otherwise it can take time after a series of cold starts, and a mix of city and highway driving for the system to reset itself.