DIAGNOSTIC REPORT Spn 6802 Fmi 31

Last updated: Monday, December 29, 2025

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Code Diagnosis Freightliner Cummins M2 Fault line FMI state System fluid heater DEF 1 not 4340 exhauster below 6802 current DEF is frozen normal Def 5

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DEF Heater Lines ISB 67 31 Codes Diagnosis DEF Frozen 2013 Hot Description was 9 QSB Engine J1939 Shut Shut Hot QSX Cummins Description 67 Condition QSL None J1939 Down Engine Exists Lamp Down

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Fault Tier 4 Cummins Codes SCR ratchetandfranktv dieselmechanic intake Clogged relative in the of time longer last pump if assembly repair age Def changed mind in Will pump on filter the of Keep bottom the is

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