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We have dd15 with a code 5426 fmi 15 and I ran a regen and…

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We have dd15 with...

We have dd15 with a code 5426 fmi 15 and I ran a regen and it wont go away, what do I need to do

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

14 cascadia

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

Yes, ran a regen its derated and filters are at 63 percent

Submitted: 1 year ago.Category: Medium and Heavy Trucks
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Answered in 3 hours by:
11/6/2020
Technician: Daniel Wilson,
 replied 1 year ago
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 14,658
Experience: Owner at DJ Wilson
Verified

Hi, My name is***** will be glad to help. We can follow up as needed on here, Give me some time to review your information and follow up with my responses. Professionals are not employees of the site but users of the site and help on here as time allows in between jobs, family,etc. Response time can vary depending on my work load each day but I will always respond back on my next available login. Feel free to respond back at anytime if for any reason we seem to get separated,for status, etc.

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Technician: Daniel Wilson,
 replied 1 year ago

SPN 5246/FMI 15 - EPA10

Regulatory Fault Ignored - Derate On

For 2011 models, this code sets when the vehicle has been driven for 30 miles while a code is present for the DEF tank level, DEF metering valve, DEF pump, NOx sensors, Blocked DEF line, DEF quality, NOx efficiency, SCR harness and/or SCR sensor.

For 2010 models, this code sets when the vehicle has been driven for 10 hours or 500 miles while a code is present for the DEF tank level, DEF metering valve, DEF pump, NOx sensors, Blocked DEF line, DEF quality, NOx efficiency, SCR harness and/or SCR sensor.

SPN 5246/FMI 15

DescriptionRegulatory Fault Ignored - Derate On.

Monitored ParameterSCR and DPF sensors

Typical Enabling ConditionsAlways enabled

Monitor SequenceNone

Execution FrequencyAlways enabled

Typical Duration2 seconds

Dash LampsCEL

Engine Reaction25 percent derate

Verification

Parked SCR efficiency test for extended SCR faults

High idle regeneration for DPF and NOx faults

Check as follows:

Show/Hide Checkboxes

  1. Connect DiagnosticLink® . Go to step 2.
  2. Check for other emission-related fault codes. Are there any Selective Catalyst Reduction (SCR) or Diesel Particulate Filter (DPF) related fault codes present?
    1. Yes; diagnose and repair the emission-related fault codes first. Verify repair.
    2. No; perform the Selective Catalyst Reduction (SCR) efficiency test or high idle regeneration. Use DiagnosticLink to clear the code.

What this means is, you will need the Detroit diagnostic software connected in order to reset the system and clear this fault. I hope you find this helpful.

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