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I have a volvo vnl 780 and I'm getting an fault code spn…

Customer Question
I have a volvo...

I have a volvo vnl 780 and I'm getting an fault code spn 5246 fmi 15

Mechanic's Assistant: Have you seen this error before with the same vehicle?

NO. I replaced dozer valve and the dozing valve wiring harness. I drove less than 300 miles then this code came up with 4094 fmi 18 the debate code I mean derate

Mechanic's Assistant: What's the model of your '18 Volvo?

Vnl 780 tractor with d13 engine

Mechanic's Assistant: Is there anything else the tractor Mechanic should know before I connect you? Rest assured that they'll be able to help you.

I replaced both nox sensors with dozing valve

Submitted: 5 months ago.Category: Medium and Heavy Trucks
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Answered in 4 minutes by:
2/11/2022
Technician: Ramon Capellan, owner / operator replied 5 months ago
Ramon Capellan
Ramon Capellan, owner / operator
Category: Medium and Heavy Trucks
Satisfied Customers: 60
Experience: Expert
Verified
Hey and welcome to just Answer is your DEF light on?
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Customer reply replied 5 months ago
No
Technician: Ramon Capellan, owner / operator replied 5 months ago
Is that the only code showing?
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Customer reply replied 5 months ago
4094 fmi 18. The derate codeWhen I changed dozing valve I cut and changed the wiring harness to valveThe engine light isn't on just the sign for CHECK
Technician: Ramon Capellan, owner / operator replied 5 months ago
that fault is for an open circuit for the def doser. Most of the time the short or open is in the chassis side of the harness near the acm. I would pull the harness apart from the acm to inside the frame. The vast majority of the opens are found in that location.
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Customer reply replied 5 months ago
When I cut and spliced the harness could I have done anything wrong
Technician: Ramon Capellan, owner / operator replied 5 months ago
Pin 40 at the ACM to pin 1 at the doser, and pin 44 at the acm to pin 2 at the doserI really don’t think so.But maybe check it one more time
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Customer reply replied 5 months ago
OkThanks
Technician: Ramon Capellan, owner / operator replied 5 months ago
No problem you got it.Have a blessed Day
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Customer reply replied 5 months ago
You have a blessed day also
Technician: Ramon Capellan, owner / operator replied 5 months ago
Thanks
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Ramon Capellan
Ramon Capellan
Ramon Capellan, owner / operator
Category: Medium and Heavy Trucks
Satisfied Customers: 60
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