Need a fuel system wiring diagram P0125A

Discussion in 'SRT Hellcat Electronics' started by HCone, Jul 7, 2015.

  1. HCone

    HCone Gold Member

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    Can anyone supply me a fuel system wiring diagram ?
    I have had a P0125A code for 2 months now, dealer seems perplexed.
    I have personally crawled under the car and checked whatever connections and wiring I could find, even changed the fuel pump relay ( on my nickel ), and still have an engine light come on and a high pitch whistle from the fuel pump trying to release the excessive fuel pressure after about 20 minutes of driving.
    I need to start tracing wires, so a diagram would greatly help.

    Any input would be appreciated
     
  2. Paladin06

    Paladin06 Have Guns Will Travel Staff Member Hellcat Car Club Gold Supporting Member

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  3. Fast cat

    Fast cat BANNED Hellcat Car Club

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    Or fnkychkn , might be helpful
     
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  4. fnkychkn

    fnkychkn swollen member Gold Supporting Member

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    i would be perplexed also, as P0125A is not a valid code.
     

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  5. HCone

    HCone Gold Member

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    sorry, meant to say P025A, thanks again for the reply
    Car showed a P026A yesterday as well...arrrgh !
     
  6. B5 Blue

    B5 Blue Platinum Member

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    To give them/you a different way of looking at it remove a pin starting with easiest. So pin 72C at power distribution block remove it with engine running and see what engine does and what code sets. If not same code then that ain't the wire and so on.
     
  7. HCone

    HCone Gold Member

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    Thanks B5, I'll give it a shot, I have an appt tomorrow afternoon at dealer again
     
  8. B5 Blue

    B5 Blue Platinum Member

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    Let me add that let's say pin 72C does emulate the code they're not done unless they see an obvious issue with the pin or component it plugs into. The next easiest pin gets removed after DTC cleared to see what it sets. It's possible to have more than one wire set the code is bottom line.
     
  9. moparbrad

    moparbrad Hellcat Member

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    It looks like they are either going to find a short or bad pcm, only a few possible causes of that code
     
  10. Alan

    Alan Active Hellcat Member

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    This code happens because the wire from PCM pin 83 to FPCM pin B (PWM Control) is open circuit or has an intermittent connection somewhere in between.
     
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  11. HCone

    HCone Gold Member

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    Thanks Alan, I will be sure to post the results, when we find the issue
     
  12. HCone

    HCone Gold Member

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    FC, do you have a diagram available showing exactly where Pin 83 and B are located?
     
  13. Dragon

    Dragon Gold Member

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    time to go to a different dealer
     
  14. HCone

    HCone Gold Member

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    FCA tech is directing the dealer thru the steps,but thanks for your most valuable input
    I have the car here and am trying to maybe get lucky and sort it out myself before it goes back to the dealer tomorrow. I have a trip planned this weekend and am paranoid to take it as it is.
     
    Last edited: Jul 8, 2015
  15. B5 Blue

    B5 Blue Platinum Member

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    If Alan is correct which I don't doubt that wire has a connection #2 in between and that's where I'd look may not be seated right but I don't know where it is
     

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