I have a 15 freightliner with a DD13 in it. Check engine light has came on with the code spn 411 fmi 1. I have also notice it hasn’t been using much def. I put close to 4 gallons in it this morning and i put 1.5 gallons in it week before last. I’ll also add that before the check engine light came on, the regen light came on first.
Dd13 Spn 411 fmi 1 code
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by MMiller01, Aug 12, 2024.
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Here's the code meaning
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