cm2250 3375 2639

[orionlover69]

Key codes are 3375 and 2639. Last time I seen these codes the ECMs were in need of updating. The guy before me that was a sworn guru never updated the software or did the company buy the ability to update the engine ECM. We didn't see these codes until the trucks had 350k on them. Mileage to hours indicates to me that your trucks idle a lot. And that is never good. With that said some questions I have are simple...

Do you update the ECMs when Insite directs you to?
Do your trucks run oilfield or are your trucks lacking APUs?
High idle times and never updating will cause these problems imho.
The 7th injectors have updated designs. Do your trucks carry the OEM after treatment fuel injectors or have you replaced them with the 2nd gen designs where the tip protrudes when injecting?
Let me know what you find.