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Same problem as previous truck code 5443 fmi 13 we know what…

Same problem as previous...

Same problem as previous truck code 5443 fmi 13 we know what the code is we need to know the fix what is causing the low pressure? what component is causing the low pressure ?

Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. The Heavy Truck Mechanic I'm going to connect you with knows all the tricks and shortcuts.

Hi I have a 2013 volvo vnl 780 with a D13 m otor code 5443 fmi 13 we know what the code is air pressure not within range and low pressure and we know that it is in the aftertreament system what we need to know is what component is causing this code so we don't just through parts at it for lots of $$

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No try that

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Answered in 4 minutes by:
4/2/2019
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: 6,630
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel
Verified
Hello and thank you for using Just Answer. My name is ***** ***** I will be assisting you with your question. This fault is a mechanical fault for the 7th injector. You will need to flow test the 7th injector and test the air pressure to the ahi module. To see if there is an issue with a ahi module or a plugged 7th injector. Please let me know if you have any follow up questions for me on this. Thank you
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Customer reply replied 3 years ago
Volvo didn't have a ahi module that cane out in modle 2014
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago
That’s not true. The AHI module was put into production in late 2012
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Customer reply replied 3 years ago
ok my production was November 2012 I can check it out do you know its locationhoe much pressure should I see at the module
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago
38-42 psi.
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Customer reply replied 3 years ago
do you know the location of the moduleHow do you check the pressure
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago
You’ll need a pressure gauge with a 1/4 quick connect fitting. The module is located under the air compressor on the drivers rear side of the block
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,630
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel
Verified
Mike Mcmillan and 87 other Medium and Heavy Trucks Specialists are ready to help you
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Customer reply replied 3 years ago
Ok Steven Thanks I have been to many Volvo shops they just want to be a parts changer cost me tons of money Have a nice day
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago
You too
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Customer reply replied 3 years ago
Steven one other questionWhen low air pressure testing sir breaks dash valve does not pop until completely empty of air
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago
They usually pop out around 30 psi
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Customer reply replied 3 years ago
Does that mean the valve is defective
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago
usually.
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Customer reply replied 3 years ago
I heard they can be re built
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 3 years ago
I would just replace it since it’s a safety item
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Customer reply replied 3 years ago
That's true thanks again
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Mike Mcmillan
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,630
6,630 Satisfied Customers
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel

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