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I have a peterbuilt with a ISL 9 in it. and it has two fault…

I have a peterbuilt...

I have a peterbuilt with a ISL 9 in it. and it has two fault codes 3712 and 3714 that will not clear. it had inactive codes 3375 and 3543. I replaced the temp sensors in the DPF and the differential pressure sensor too. I put a new DEF filter in. and cleaned out the dosing line, and put a new doser on. did a regen on it and the 3712 and 3714 are still active. any help would be great.

Mechanic's Assistant: What is the complete model and serial number of your machine?

Engine S.N is(###) ###-####

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

Not that I can think of now.

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Customer reply replied 3 years ago
the engine S.N. is 73511344
Answered in 4 hours by:
10/24/2018
Technician: roybelding, Shop Foreman Freightliner trucks replied 3 years ago
roybelding
roybelding, Shop Foreman Freightliner trucks
Category: Medium and Heavy Trucks
Satisfied Customers: 12,915
Experience: Shop Froeman for Freightliner Trucks
Verified

hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.

Roy

3375

Possible causes of this fault code include:

  • A malfunctioning aftertreatment fuel injector
  • A face plugged aftertreatment diesel oxidation catalyst
  • A malfunctioning aftertreatment diesel particulate filter differential pressure sensor
  • An engine malfunction resulting in high engine out soot.

3543

Troubleshoot all other active NOx sensor and SCR dosing system related fault codes before this fault.

Possible causes of this fault include:

  • Malfunctioning aftertreatment diesel exhaust fluid dosing system.
  • Exhaust system leaks
  • Malfunctioning SCR catalyst
  • Degraded, diluted, or incorrect diesel exhaust fluid
  • Diesel exhaust fluid deposits in the decomposition tube.
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Technician: roybelding, Shop Foreman Freightliner trucks replied 3 years ago

3712,3714 are information codes for derating.

I would have all the items in the other codes checked. check the DOC for fac plugging.

Check the DEF doser injector for being clogged with debris as well.

Roy

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Technician: roybelding, Shop Foreman Freightliner trucks replied 3 years ago

do you have any other questions??

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Customer reply replied 3 years ago
No. thanks for your help.
Technician: roybelding, Shop Foreman Freightliner trucks replied 3 years ago

Please take a moment and rate my service 5 stars or better so the site will pay me for my efforts. You can always ask follow up questions.

Roy

roybelding
roybelding, Shop Foreman Freightliner trucks
Category: Medium and Heavy Trucks
Satisfied Customers: 12,915
Experience: Shop Froeman for Freightliner Trucks
Verified
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roybelding
roybelding
roybelding, Shop Foreman Freightliner trucks
Category: Medium and Heavy Trucks
Satisfied Customers: 12,915
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