How screwed am I?

Discussion in 'Freightliner Forum' started by Hazardous, Oct 19, 2020.

  1. Hazardous

    Hazardous Light Load Member

    Jul 25, 2012
    So my driver is at a Petro in Illinois. Both amber engine lights came on and truck is derated to 55.

    We had the DEF pump replaced like 2 weeks ago.

    Petro hooked it up to a J Pro and we got this print out...they then said to go to the dealership because they can't handle anything on here.

    These are the codes it is showing active...How screwed am I?

    SPN5841 SPN 14
    SPN521049 SPN 31
    SPN521052 SPN 31
    SPN522117 SPN 5
    SPN520372 SPN 16
    SPN5298 SPN 14

    Is this just bad DEF ####ong up with works or am I in for a serious bill?
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  3. RocketyMan

    RocketyMan Medium Load Member

    Jun 5, 2015
    Thanks for putting the SPN/FMI for the fault codes. What is the last 6 of vin?
    nikmirbre Thanks this.
  4. Judge

    Judge Road Train Member

    Mar 19, 2014
    Newport, Ar
    ECU 5841 14 DEF Quality Low: Diesel Exhaust Fluid Quality Malfunction Special Instructions

    SPN 521049/FMI 31 - GHG17 DEF Inducement DEF Lamp Active Table 1. SPN 521049/FMI 31 Description This Code Sets When There is a Code Present for the Diesel Exhaust Fluid (DEF) Tank Level, DEF Dosing Unit, DEF Pump, NOx Sensors, Blocked DEF Line, DEF Quality, NOx Efficiency, Selective Catalyst Reduction (SCR) Harness and/or SCR Sensor. Monitored Parameter SCR and Diesel Particulate Filter (DPF) Sensors Typical Enabling Conditions Always Enabled Monitor Sequence None Execution Frequency Always Enabled Typical Duration Two Seconds Dash Lamps DEF Lamp Engine Reaction 25 % Derate Verification Parked SCR Efficiency Test for Extended SCR Faults High Idle Regeneration for DPF and NOx Faults

    Check as follows: 1. Connect DiagnosticLink ®. 2. Turn the ignition ON (key ON, engine OFF). 3. Check the ACM software level. Is the ACM software level ZGS 002 or greater? a. Yes; Go to step 4. b. No; update the ACM using the latest server information. Perform the repair verification. If the fault returns, Go to step 4. 4. Check for other emission-related fault codes. Are there any Selective Catalyst Reduction (SCR) or Diesel Particulate Filter (DPF) related fault codes present? a. Yes; diagnose and repair the emission-related fault codes first. Verify repair. WARNING: PERSONAL INJURY To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. WARNING: PERSONAL INJURY Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. • Always start and operate an engine in a well ventilated area. • If operating an engine in an enclosed area, vent the exhaust to the outside. • Do not modify or tamper with the exhaust system or emission control system. 2 SPN 521049/FMI 31 - GHG17 4 All information subject to change without notice. WARNING: HOT EXHAUST During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. b. No; perform a high idle regeneration. When the engine returns to idle, turn the ignition off and wait for all the modules to power down (usually about one minute). Turn the ignition on (Key ON / Engine OFF) and wait one minute, then start the engine and run a Parked SCR efficiency test. Use DiagnosticLink to clear the code.

    spn 521052

    The codes you are getting indicate that you could have multiple things going on here however, once you troubleshoot each of these fault codes separately, verify that DEF contamination fault is either actual contamination or poor quality fluid, or just a sensor wiring issue giving false readings, run through the other checks listed for the 520372 fault code covered within the service bulletin I posted as you may need to have your software re-flashed and updated by the dealer as your problems could be related to a software glitch. You could very well attempt to update the software first and then see what fault codes still exist to troubleshoot each of those separately but it is likely you will need to have your software updated according to the bulletin
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