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Paccar MX-13 EPA 13 RANDOM CODE SPN 1231 FMI 2

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by rshakin, Jul 1, 2019.

  1. Jul 1, 2019 #1
    rshakin

    rshakin Bobtail Member

    20
    0
    Mar 14, 2012
    0
    Hello guys,

    Just picked up a truck Peterbuilt 389 with Paccar MX-13 EPA 13 Engine.

    Anyone ran across this code

    Hardware or software fault on CAN2 bus U1011 1231 2 M1 + R1 n Comprehensive

    This was pulled with DPA5 Adaptor with their built in house software.

    Symptom: Truck was in a pull going up 6% grade 80 ambient temp, truck flashed stop engine immediately red code, check came on and stayed lit, warning went away 1.5 seconds later. Filters were just pulled and cleaned about 4 days ago, 1.6 was the reading before the cleaning 1.1 after cleaning. Any ideas ?


    DPF Cleaned
    DEF Filter Replaced
    OIl Change done all Paccar filters
    Overhead ran to Paccar EPA13 Spec
     
    rshakin, Jul 1, 2019
    rshakin, Jul 1, 2019
    #1
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  3. Jul 1, 2019 #2
    spsauerland

    spsauerland Road Train Member

    4,296
    10,879
    May 31, 2010
    West Harrison, In
    0
    Have ran across the code multiple times and have a Pete just starting to throw it once every couple days. I have replaced VGT actuator, BPV actuator, and repaired pins in harness for BPV and EGR valve to repair this fault on other units, so need to do meticulous troubleshooting because all the parts are pricey. Here is a troubleshooting guide that helps isolate the problem. Make darn sure you have good power and ground before condemning any part.
     

    Attached Files:

    spsauerland, Jul 1, 2019
    spsauerland, Jul 1, 2019
    #2
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  4. Jul 2, 2019 #3
    pushbroom

    pushbroom Road Train Member

    1,769
    7,205
    Sep 1, 2012
    0
    That code can be a real #####. Check the mega fuse on the rh side of the batt box. Give the cables a 10 pound pull test as the rear likes to corrode off. Turbo actuator wiring pigtail can sometimes get rubbed as well. After that its alot more indepth and more technical troubleshooting following the document @spsauerland posted.
     
    pushbroom, Jul 2, 2019
    pushbroom, Jul 2, 2019
    #3
    QUALITYTRUCK and spsauerland Thank this.
  5. Apr 6, 2020 #4
    Hebrew Hammer

    Hebrew Hammer Bobtail Member

    10
    0
    Apr 6, 2020
    0

    I was wondering if you had any update in this issue. Had the same thing happen to me yesterday.
     
    Hebrew Hammer, Apr 6, 2020
    Hebrew Hammer, Apr 6, 2020
    #4
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