Question about 1999 Ford F150 Regular Cab

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Service Engine Soon Light

I have a 1999 ford f150 reg cab w/approx 80300 mi. My Service Engine Soon Light came on this a.m. which has never occurred before.

I erroneously put in Summer Coolant 2 days ago.

Would this cause the light to come on and should I wait for the light to go out or take the truck in for a Diagnostic Test? Thanks Kim

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  • kimberlie200 Dec 30, 2008

    Thank you for your response, i will go to an Autozone and advise of what caused the light to come on.

    If i only refilled less than half of the coolant container, would i still need to drain and refill?

  • kimberlie200 Dec 30, 2008

    will do, thnx..where is an inexpensive place that i can have my radiator flushed...lube zone quoted 69.99



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No the coolant wouldn't cause the light to come on,and yes if you don't have the know how to buy and attach an obdii code reader to your truck then you will have to take it to a garage to be sure what the problem is........however the check engine light is a warning that something is experiencing a problem but correction of the problem doesn't have to be immediate, if you can't afford it or don't have the time to have it looked at right away.(keep in mind that with the light on your computer is in limp mode and you will see a drop in fuel mileage)But to get the light to go out you need to either disconnect the battery for 5-10 min or have someone check and reset the light.if you do the battery disconnect to reset it the light may not come back on for some time or may come on right away.last winter i had the light come on for an o2 sensor heater.........i reset the code and never saw it again. so if you can try the battery disconnect reset first if the light comes back on then take it to a garage.
hope this helps!

Posted on Dec 30, 2008

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Take it to Autozone or Kragen auto for a free check of the trouble code that turned on the check engine/service engine soon light, then post the result here, there are over 100 diff faults that can turn the light on, most common are O2 sensors and loose gas caps.

Posted on Dec 30, 2008

  • yadayada
    yadayada Dec 30, 2008

    The coolant mistake would not cause this light. but u do need to drain and refill with correct type or u can have problems with system components like the water pump or heater core and others.



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I have a 1999 ford f-150 w/approximately 80300 miles and the svc engine soon light came on this morning. I accidentally used summer coolant vs. multiseasonal coolant. Would this cause the light to come on?...

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