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Thread: P0325 error code

  1. #1
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    P0325 error code

    So I recently started getting a P0325 error code and the Check Engine light is on. The P0325 error is pointing to the Knock sensor. I replaced the knock sensor with a new one from the dealership and no luck. I then replaced the spark plugs with OEM plugs with no luck. Next I ran it with 2 tanks of premium from a top tier gas provider and ran a bottle of fuel injector cleaner thru it. No Luck there either. Lastly I took it to the dealer who ran a diagnostic on it and di a fuel injector cleaning on it as it was only $50 bucks more than the diag. Took the car home and about 3/4 of the way there the check engine light came back on with the same P0325 code. I turned around and headed back to the dealership who said the tech could not see anything wrong with it and suggested the Knock sensor I bought from them earlier may be bad. Next step is to replace said knock sensor and see if that resolves it.
    My question is to the group, If this does not resolve it, (I am thinking it will not), Has anyone else seen this issue and what did you do to resolve it?

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    AWD enthusiast Lifetime Member 5port's Avatar
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    Is this the 1.4L or 2.4L 500X? Either way it could also be a wiring harness issue. Something may have been damaged.
    Last edited by 5port; 12-16-2018 at 04:16 PM.
    2016 Fiat 500X Easy

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    Dealer said they verified cabling. Beginning to wonder if it's the PCM/ECM.

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    AWD enthusiast Lifetime Member 5port's Avatar
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    Its rarely if ever the PCM with this error. Its either a faulty knock sensor or the wiring between it and the PCM is open. If you can get a code reader that streams in real time you might be able to verify the signal is present. Good videos on Youtube on how to T/S P0325.

    https://www.youtube.com/watch?v=W2cFuheKBgQ
    2016 Fiat 500X Easy

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    Well I replaced the knock sensor for the second time per the techs recommendation and the check engine light came back on. Took the car back to the dealership and this time the tech got someone at engineering to remote into the car and do some snooping where they saw a P0324 code pop up sporadically. With that info the tech replaced the PCM and have been a day and a half without any issue.

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    AWD enthusiast Lifetime Member 5port's Avatar
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    Glad the issue is resolved. I stand corrected!

    Edit: BTW P0324 means the reference voltage coming out of the PCM suppiied to the knock sensor was out of spec (should be +5 volts).
    Last edited by 5port; 12-19-2018 at 09:49 AM.
    2016 Fiat 500X Easy

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    Again, 1.4 or 2.4?
    16 500X Pop, Rosso, 1.4T/M6, 18 O.Z. 45th Anniversary wheels, H&R springs, Momo shift knob, K&N drop in, MPX Throttle Body, Deyeme Racing CDV delete, Magnaflow (Renegade) cat-back with custom 2.5 B-pipe by http://stagefp.com/, ATP Highflow downpipe.

    13 500 Abarth, Bianco, M5,
    17, Koni shocks, Eibach Prokit, CFP Hats, ES/EC bumpstops and seats, Powerstop rotors and pads, K&N drop in. (Wife's)

    95 Wrangler, Aqua, 4.0/Auto,
    33 on 15x8, 4 lift, too much to list here (Also Hers)

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    Glutch, I have the same problem. I replaced one knock sensor $400+ and the code came back on. They did not return calls or texts. Took it to another shop who said that previous shop did not use Mopar parts, so they replaced it with OEM parts (knock sensor, bolt, and plug). Still did not work. They recommended go to dealer. Error codes were P0324, P0325, and P0327. I have held off going to a dealer because they are 60 miles away. This is a 2014 500L with 47K miles on it. It seems like for all the fancy diagnostics, the strategy is to replace parts until something works, at increasing expense. I It seems to drive fine. Am thinking of selling it somewhere that does not have state inspections. We (LA) have yearly inspections that cannot be passed if the CEL is on. This is a shame, because I really like the little car.

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