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Open circuit issue

Discussion in '3rd Gen - 2007 - 2017' started by Dillardsix, Feb 27, 2021.

  1. Dillardsix

    Dillardsix Member

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    I have a 2016 expedition el limited that has 10 check engine codes on it. It reads 02 sensors, cam sensors, evap, etc. It doesn't seem to have as much power as it did before this started. I can turn off the light and it will run and drive fine until you turn it off. It will come right back on as soon as it is started again. Was told it may be a open circuit problem. Please help!!
     
  2. Psychobot90

    Psychobot90 Full Access Members

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    @Dillardsix sounds like it's time to inspect your writing harness. You'll want to start at the battery and go down the lines to see if your heat wrap, tape, or flex have any obvious visibile damage (melted, missing, torn) and if so, inspect those areas to ensure the wires there aren't exposed and/or making contact where they shouldn't. I'd also look for any splices or connectors that may have visibile issues.
    It helps that you have multiple codes, because your wiring issue will likely be upstream (toward the battery) from all of these sensors.

    One thing that might help is to pick the sensor closest to the battery which threw a code and then look for the wiring diagram for that sensor circuit and for the diagram, working your way back from the sensor to the battery to find your problem spot.

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  3. JamaicaJoe

    JamaicaJoe Full Access Members

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    Since this happens right when you start the engine, don't discount a weak battery.
    And or alternator.
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  4. Yupster Dog

    Yupster Dog Super Moderator Staff Member

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    Check all your ground wires to make sure you have a good ground. When you have multiple problems like that (all at once) it usually is a lifted ground somewhere.
     
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  5. Dillardsix

    Dillardsix Member

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  6. Dillardsix

    Dillardsix Member

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    P0010 a cam sensor actuator open bank 1
    P0013 b cam sensor actuator open bank 1
    P0020 a cam sensor actuator open bank 2
    P0023 b cam sensor actuator open bank 2

    P0135 02 sensor 1 bank 1
    P0141 02 sensor 2 bank 1
    P0155 02 sensor 1 bank 2
    P0161 02 sensor 2 bank 2

    P0443 evap
    P0446 evap vent

    Please help! All these codes are showing at once. 2016 Expedition limited
     
  7. Psychobot90

    Psychobot90 Full Access Members

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    Have you checked your PCV? Depending on the part number, it was a known issue. If the valve is bad and is stuck (open or closed), I beleive it could create all the other codes you're showing. Worth a shot.
    Pull the valve and shake it, does it rattle like a can of spray paint? Post a couple photos of it here along with the part number which is embossed on the side of it.
     
  8. mnachreiner86

    mnachreiner86 Full Access Members

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    I’m in for wiring harness


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  9. Psychobot90

    Psychobot90 Full Access Members

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    @Dillardsix because you're showing ALL the codes for O2 and Cam sensors, and becsuse it is the ecoboost we're talking about, almost all of these codes can be attributed to intake/emissions controls. With that said, if we look to your codes again, we do see a possible common factor here in the evap codes. It's a closed system and there is no MAF, so a bad sensor/valve here creates rich or lean conditions which will throw codes all the way down stream. In this case that could easily mean the cam and O2 sensors.
    If it were me, I'd start with the three common problem sensors on this engine - the Charge Air Intake (CAI) sensor, Camshaft Position Sensor (CPS), and the Positive Crankcase Ventilation (PCV) solenoid. You'll want to inspect each of these for defects in the electrical connections, exposed wiring, improper ground, etc. or in the case of the PCV, a vacuum leak.
    I've had similar emissions related codes on my '15 which were all solved by repairing or replacing one of these sensors (after thorough research and diagnostics).

    I agree, it is likely an electrical circuit issue, but whether it's wiring or sensor related remains to be determined. I'm just trying to narrow it down for you so you have specific areas to focus on without having to trace ALL your wiring.

    Keep us posted on your findings!
     
  10. Dillardsix

    Dillardsix Member

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    I found the problem had dvd player installed thay left a fuse out put back in fixed it
     
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