Spn 520342 Fmi 17 - Ground Warehouse Wwwfedexjobscompitpoint Search Result That code is for low nox conversion efficiency. It means that your def system is not doing what it is supposed to and. I am not seeing a spn 520342 fmi 17 fault in troubleshooting manual for epa 07, 10 or ghg14. Looking at manual for ghg17 don't see it either. Can you confirm the fault again. Spn 520361 fault is a fault for the soot sensor and the 520342 is a fault for def pump speed high. You need to make sure that your def tank level is above 1/4 tank and also make sure. The fmi is used along with the spn to provide specific information that relates to a diagnostic trouble code (dtc). The fmi may indicate that a problem with an electronic circuit or an. Common fmi errors from 0 to 21 numbers. Suspect parameter number (spn) and failure mode indicator (fmi) full code list. Make sure there no leaks in the. November 30, 2025 date added to. Def pump psi was 145 with 2500 rpm pump speed. Installed mechanical gauge in line with dosing unit. Mechanical gauge is reading the same as the pressure sensor. I found that as i ran the. Jeremy, i got these codes, sid 253 fmi 12, spn 639 fmi 9 and sid 231 fmi 9, freightliner century detorit 12. 7 There is a recall for software update for this very reason. The new software for ghg17 is supposed to prolong the life of nox sensors. 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,.
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