1. #1
    mmello13's Avatar
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    Camshaft sensors

    I have a 2013 jku rubicon. Has a 4 in lift all after marlet control arms, driveshafts, track bars etc. After putting lift tires and regearing my jeep my camshaft sensors come on after traveling on the highway for any length of time. The quickest it's come on was about 15 minutes traveling 70 mph and the longest was about an hour going the same speed. I reprogrammed everything in my jeep and it still happens but my speedo is spot on. Anyone else have this problem? Any ideas as to what it could be? These are the codes i pulled from flashpaq

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  2. #2
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    Re: Camshaft sensors

    I would work the CMP sensor as a separate issue - and that is likely a wiring issue.






    Possible Causes p0369
    (F856) 5-VOLT SUPPLY CIRCUIT OPEN
    (F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
    (K441) CMP SENSOR SIGNAL 1/2 CIRCUIT SHORTED TO VOLTAGE
    (K441) CMP SENSOR SIGNAL 1/2 CIRCUIT OPEN
    (K441) CMP SIGNAL CIRCUIT SHORTED TO GROUND
    (K441) CMP SENSOR SIGNAL 1/2 CIRCUIT SHORTED TO THE (F856) 5-VOLT SUPPLY CIRCUIT
    TONE WHEEL/PULSE RING
    CAMSHAFT POSITION SENSOR


    U0401 I think is key to the others " implausible data " the modules are sharing info and the changes are not programmed or accepted

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    Re: Camshaft sensors

    Quote Originally Posted by k-2 View Post
    I would work the CMP sensor as a separate issue - and that is likely a wiring issue.






    Possible Causes p0369
    (F856) 5-VOLT SUPPLY CIRCUIT OPEN
    (F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
    (K441) CMP SENSOR SIGNAL 1/2 CIRCUIT SHORTED TO VOLTAGE
    (K441) CMP SENSOR SIGNAL 1/2 CIRCUIT OPEN
    (K441) CMP SIGNAL CIRCUIT SHORTED TO GROUND
    (K441) CMP SENSOR SIGNAL 1/2 CIRCUIT SHORTED TO THE (F856) 5-VOLT SUPPLY CIRCUIT
    TONE WHEEL/PULSE RING
    CAMSHAFT POSITION SENSOR


    U0401 I think is key to the others " implausible data " the modules are sharing info and the changes are not programmed or accepted
    So how do I go about getting this all fixed? It drives me insane when I'm in mid drive the lights come on cruise control stopped and then every time I have to slow down and I release the gas the jeep bucks. Also while I'm trying to accelerate it takes forever. I lose power in shifting and acceleration. I have a manual.

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    Re: Camshaft sensors

    a I suggested work the cam issue - the above list Is what to check...The circuits wiring and th connectors.

    The programming may require a jeep scanner- I do not know if the combination gears, tires can be programed - might not be a selection.

  5. #5
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    Camshaft sensors

    Did you put a new Cam sensor in?

    If so, was it OEM?



    The cam sensor and crank sensor signals are used by the PCM to set timing and shifting.... if one signal is off timing you will get some codes.


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    Last edited by JPNinPA; 10-20-2017 at 03:23 PM.
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  6. #6
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    Re: Camshaft sensors

    Ok Idk how to check any of that haha. And yes I put new ones in. I had one from AutoZone in and the code kept coming so I replaced with ones from the dealership and same, keeps coming on.

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    Camshaft sensors

    So you replaced both. Did you do a relearn/reflash? Without a relearn the code will still show.
    There is a oil control valve that needs to be replaced.

    All of this is in a TSB. I can't find the tsb number right now.

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    Last edited by JPNinPA; 10-20-2017 at 04:32 PM.
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    Re: Camshaft sensors

    How do you relearn it?

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    Re: Camshaft sensors

    If you have a capable programmer it is a function in the menu. Otherwise the dealer should be able to do this.


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    Re: Camshaft sensors

    Any luck?


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  11. #11
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    Re: Camshaft sensors

    Had them reflash. Hasn't come on yet but haven't had any long drives either. The check engine light was on after they refreshed it with these codes. But then it shut off a day or 2 later.

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    Re: Camshaft sensors

    Sounds good so far. Hope it works out.

    Did they charge for the reflash?


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  13. #13
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    Re: Camshaft sensors

    No

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    Re: Camshaft sensors

    Quote Originally Posted by JPNinPA View Post
    Sounds good so far. Hope it works out.

    Did they charge for the reflash?


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    So does this mean I have to reprogram my tires and everything back in? Didn't think of that. If they reflashed the computer does that make it seem to the computer everything is back to stock?

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  15. #15
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    Camshaft sensors

    IDK about the tires.
    I believe it allows the new CPS to be learned, so the PCM is not looking for the old values.

    Regards,
    JPNinPA

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    Last edited by JPNinPA; 10-28-2017 at 07:11 PM.
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