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Oem code 3712 and spn 5246 derate cant clear them. Cummins 6…

Customer Question
Oem code 3712 and...

Oem code 3712 and spn 5246 derate cant clear them

Mechanic's Assistant: What's the make/model/year of your truck? Engine type?

Cummins 6 ltr and 2915 frieghtliner it a school bus but it also saying outlet nox corrected o ppm but outlet NOx reads 278ppm

Mechanic's Assistant: Are you fixing your truck yourself? What have you tried so far?

2015 frieghtliner

Mechanic's Assistant: Anything else you want the truck mechanic to know before I connect you?

Just scannning and regene

Submitted: 3 years ago.Category: Medium and Heavy Trucks
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Answered in 6 minutes by:
2/8/2019
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,762
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel
Verified
Hello. My name is***** am a Cummins Tech. I seen that your question had been unanswered. Do you still need help with this? Thanks
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Customer reply replied 3 years ago
i do
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago

Okay, No problem. The 5246 fault is just an inducement fault. This means that derates are active presently. Now on your nox readings, How far into the regen was this noted?

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Customer reply replied 3 years ago
all the way
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago

What did the inlet say? Did that number drop pretty good after the regen was over? What all inactive faults did you have to start with?

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Customer reply replied 3 years ago
these is the only inactive faults 308ppm and 338ppm correted
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago
What I do is after a regen is done I hold the throttle wide open to help blow the hydro carbons out of the ex and let it idle for 2 mins then the reading should be under 100We do have a service program on the scr catalyst now. Can I get the Esn?
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Customer reply replied 3 years ago
where am i going to find the esn? sorry been a long week
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago
On the ecm data plate or on the upper cover. It will also be on the top bar in insite
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Customer reply replied 3 years ago
DT90002.24sorry wrong number
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago
That’s the ecm cal code
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Customer reply replied 3 years ago
73670555
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago
Okay. I am just waiting for the site to come back up to check this. We had a big issue with the scr cats around the years of 2014-2016. They were changing them from the 3 bung to a 2 hung
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