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Blinking check engine light

Discussion in '3rd Gen - 2007 - 2017' started by HavasuMike, Nov 25, 2020.

  1. HavasuMike

    HavasuMike Full Access Members

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    This is the third time this has happened. I stomped it when passing another vehicle (about 80 mph). The check engine light started blinking and lasted about 15 seconds. This has happened a couple times before but I didn't do anything about it. I am going to check to see if there are any codes showing. Any thoughts on this?
     
  2. JExpedition07

    JExpedition07 That One Member Supporting Member

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    Usually indicative of a heavy misfire count on one or more cylinders
     
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  3. tojohnso

    tojohnso Full Access Members

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    When the check engine light blinks - that's bad. Means you have a critical issue with the motor. My guess is it could be a spark plug pack going bad (they are on top of each spark plug) a knock sensor going bad, etc. The codes should tell you which cylinder is having the issue. Once you have one pack going bad, I'd replace them all - or at least carry one or two spares with you.
     
  4. 07navi

    07navi Full Access Members

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    Fix it very soon since it is flashing. Not good for the cats.
     
    Last edited: Nov 26, 2020
  5. Trainmaster

    Trainmaster Old School Member

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    Blinking light is a miss. When were the plugs last changed? That's where you'd start with a miss under load.

    If the plugs are fairly new, I'd look for a bad coil and replace it with an OEM one.
     
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  6. bloodhound

    bloodhound Full Access Members

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    This
     
  7. JasonH

    JasonH Full Access Members

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    This happened to me while towing with around 95,000 miles on the odometer. Misfire on two cylinders when accelerating to pass. I changed the plugs and haven't seen it again since.
     
  8. HavasuMike

    HavasuMike Full Access Members

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    Thanks everyone. I'm at 96000 and have never changed plugs. Sounds like it's time. I'll check the code too.
     
  9. 07navi

    07navi Full Access Members

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    Past due. I change mine every 30k miles.
     
  10. tojohnso

    tojohnso Full Access Members

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    Just because you do doesn't mean it's recommended. The Ford guidance is replace spark plugs every 105K miles. Having 95K on the unit is close so if having issues, could make sense.
     
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