P025A code/whistling fuel pump...Ok to drive?

Discussion in 'SRT Hellcat General Discussions' started by HCone, Jun 13, 2015.

  1. HCone

    HCone Gold Member

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    I have a P025A code up again after 300 miles, ( open circuit fuel pump ) Took it to dealer to make appt, but can't get in for a week. He told me the fuel pump will default to 100 percent pressure, and it will be Ok to drive.
    Last night the fuel pump stating making a very loud "whistling" noise while at idle.
    Just wondering what the experts have to say? Ok to drive or not?
    Performance seems unaffected
     
  2. B5 Blue

    B5 Blue Platinum Member

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    Don't sound right. Are you low on fuel? What did they do the last time?
     
  3. HCone

    HCone Gold Member

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    full tank of fuel, last time code showed, it kept coming and going, disconnected the battery and code stayed of for about 300 miles.
    The last couple of days the engine light is intermittent off/on as well as the code in the DID.
    Almost seems like a loose connection, as the engine light and code keep coming and going. The whistling is new.
     
  4. B5 Blue

    B5 Blue Platinum Member

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    Whistling is weird better take it in, if pump quits so will car
     
  5. Alan

    Alan Active Hellcat Member

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    Fpcm defaults to 80% if communication is lost between pcm and fpcm, 100% if internal fpcm failure, check all harness connections between pcm and fpcm. Could be a faulty connection somewhere in that harness.

    Whistling noise is the pump pressure relief valve since pressure is too high from the high pump speed. Talked to SRT tech for answer. Make sure they actually fix the wiring and not just start replacing modules that aren't necessarily faulty, because problem will come back. Sometimes harness gets a nick in it or contacts aren't seated properly into modules.
     
    Last edited: Jun 13, 2015
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  6. HCone

    HCone Gold Member

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    Thanks for the input !!,

    That makes complete sense, the pump is not whistling today at all. I have an appt next Friday for them to check over, whatever it is, should be an easy fix.
    In the meantime, they told me to drive it
     
  7. Paladin06

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

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    Never heard of this failure before. Keep us informed.
     
  8. fnkychkn

    fnkychkn swollen member Gold Supporting Member

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    can you post the source of this information? all publications I can access say 100% (limp mode) for any failure.
     
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  9. purnrg

    purnrg BANNED

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    You're driving too slow, the Kitty wants some more milk (nee GAS)
     
  10. Alan

    Alan Active Hellcat Member

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    You are correct, but service manual should say 80% according to tests run by SRT tech I spoke with. He said manual needs updating.
     
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  11. fnkychkn

    fnkychkn swollen member Gold Supporting Member

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    Hoping to get access to one for testing.
     
  12. HCone

    HCone Gold Member

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    Well it appears the fuel pump module is loose in the fuse box again, pushed on it and engine light has been out all day, and I drove 200 miles.
    At least it SHOULD be an easy fix for the dealer
     
  13. B5 Blue

    B5 Blue Platinum Member

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    You mean relay in fuse box by battery?
     
  14. HCone

    HCone Gold Member

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    yes
     
  15. Alan

    Alan Active Hellcat Member

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    FPCM is located in trunk in front of right rear tail light. It's behind the carpet. Need to remove some snap on rivets then pull back the carpet. Not that easy.

    I think you were referring to the supply relay which is not the command signal line from PCM. Command wire will be routed in the harness bundle to the FPCM. lt makes its way all the way up to the PCM in the engine bay and it has a couple of connectors that it gets routed thru, so they'll need to check all of these.

    Most of the time they just have to unplug all of them and plug them back in and everything is fixed. Sometimes wires get nicked during assembly and short to the chassis which corrupts the signal making the problem intermittent due to vehicle bending and twisting.
     

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