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check engine light
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  1. General Technical Chat
    Hi all, I've been tearing my hair out recently trying to diagnose and get my 2016 Focus SE back on the road. We've had some pretty bad flooding in my area recently, and I had error codes recently for a faulty Throttle Position Sensor, and was able to resolve these by replacing the throttle...
  2. General Technical Chat
    I have a 2015 Ford Focus hatchback se. my check engine light is on and my car won’t go in reverse (though does go forward). I have heard a concerning noise from my engine every now and then about a month or so before this check engine light came on. Sounds like the engine is straining. Working...
  3. New Members Check In!
    So my focus popped up 3 codes to be specific PO300- multiple cylinder misfire PO302- cylinder 2 misfire PO316- engine misfire on startup first 1000 rev I originally thought it was my spark plugs which helped but didn’t stop it. What do you guys think and do you think I have to take it in or can...
  4. DURATEC Performance (2003-2007)
    I have the PZEV 2.3L Duratec, and my check engine light is on. I had bought a cheapo cold air intake, and when I had the codes read all 3 of my O2 sensors were throwing a code. I just upgraded to the FSWerks Cool-Flo and reset everything by pulling the battery cables and what not and the light...
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