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2004 Dodge Ram 2500 Question: Where is the Powertrain Control Module located at on the Transmission?

 

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mud bunny, 5.7L V8 HEMI, Rutherfordton, NC, January 15, 2014, 20:01
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The diagnostic code Im getting is p0058 I was told that their is 3 Possible Fixes for this code. Replacing the Pcm is one of them. Where it is Located at So I can Change it??? The Parts store told me in order to Know Which one My truck has I Need to find it and get a number off of it Before they can even give me a Price for the Part!!!

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  • Answer #1

    pushrod January 15, 2014, 20:48
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    There is no code "POO581"! However code PO581 is for a problem with the cruise control, why would you want to replace the PCM?? Whitout proper diagnosis, you are wasting time and money!

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    mud bunny, January 15, 2014, 21:06
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    The CODE is p0058 No one Anywhere

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    pushrod, January 15, 2014, 21:22
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    Sorry i read it wrong but that code POO58 is for the downstream O2 sensor heater circuit so my answer reamains the same! It needs to be checked out before any work is done!! PCM is the least likely suspect. What kind of trouble are you having with the truck? Maybe we can help you out, with that info.

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    mud bunny, January 15, 2014, 21:38
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    There is 3 Possible Fixes for this Code.... Replace o2 sensor bank 2 sensor 2, repair o2 sensor connector and Replace . I have COMPLETED the Replacements of the First 2 Items I Listed and Engine light STILL ON SO Im Left with Changing the Powertrain Control Module Do U Know WHERE it is LOCATED AT?

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    pushrod, January 15, 2014, 21:52
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    Yes! Still need more diag!!!!! What about the wiring? Possible blown fuse! Junk parts! You posted something about where is it located on the transmission?? Well that aint WHERE it is FOR SURE! try this www.alldatadiy.com
    Good luck. (3 possible fixes,, really)

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  • Answer #2

    csubak30 January 15, 2014, 20:58
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    Agree #1. Get the read and have them print the ticket and give it to you. Then you can post everything on it to this site.

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    mud bunny, January 15, 2014, 21:04
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    p0058 is the Code on the Print out from the Parts Store!!

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    csubak30, January 15, 2014, 21:55
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    Now that it has been changed is the vehicle running normally? The code could will take a while to clear in most cases. Unless you have the ability to clear it yourself. I read the code wrong initially too it looked like p00581. Didn't see that was an I. Sry about that.

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  • Answer #3

    cardocIII from Gillespie's Auto Service, January 16, 2014, 03:32
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    Three possible fixes for a P0058? Let's see what that is and what it means.
    The PCM supplies power to the O2 sensor heater circuit, and it goes through the heater to a ground connection. When first turned on, a heater circuit has "low" resistance, but as it heats up the resistance increases, this causes the current flow to decrease. Once the desired current level is reached the PCM then pulses the power to the heater circuit to reduce the electrical load while maintaining the sensor's heater temperature. The possible problems are of course the O2 sensor, the wiring, and the PCM. It can't be a fuse or an ASD relay issue because no other circuits are affected. Have you measured to prove that there is power to the O2 heater being provided by the PCM? (which includes the wire in between) Have you confirmed that the ground circuit is intact? In scan data what is the duty cycle that the PCM reports that it is turning the heater on? How does that compare to the other downstream sensor's reported control command?

    The next steps answer most of the questions with this system. How much current is flowing in the down stream heaters, do they both draw the same current? I find a lot of aftermarket sensors that the heater circuit resistance is incorrect and the PCM reacts to them like they are a bad sensor. Measuring the circuit on time and current proves when this is the case.

    BTW. The powertrain control module is on the firewall, right rear of the engine compartment. It's a convenient spot to do most of the testing.

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    mud bunny, January 16, 2014, 05:33
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    THXS SO MUCH UR ANSWER IS THE ONE I NEEDED LAST NIGHT!! MAY I ASK U ANOTHER QUESTION ALSO? THE PCM CONTROLS ALOT OF THINGS, CORRECT? THEIR IS OTHER ISSUCES W THE TRUCK LIKE THE GAS LIGHT DONT COME ON BUT ALL OF A SUDDEN U RUN OUT OF GAS. THE DIGITAL READOUT WILL SAY 30 MILES LEFT BEFORE U RUN OUT OF GAS BUT UR SITTING ON THE SIDE OF THE RD WITH NO GAS!! IS THIS SOMETHING ELSE THE PCM CONTROLS? IF NOT DO U KNOW HOW TO FIX THE ISSUCE? WE HAVE HAD NOTHIN BUT PROBELMS WITH THIS TRUCK SINCE WE GOT IT!!

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  • Answer #4

    Greg's Orange Auto (12205 Answers) , Orange, CA - (714) 361-9386
    globalhelper January 16, 2014, 06:32
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    get a free diag from aamco

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