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go-west..
go-west.., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 1152
Experience:  Technican with 20 years experience focused on engines and electrical.
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I have a code 412 fail 31 on a cummins isb 6.7, Freigjtliner

Customer Question

I have a code 412 fail 31 on a cummins isb 6.7
JA: What is the complete model and serial number of your machine?
Customer: Freigjtliner 2011 m2
JA: Are you fixing this yourself? What have you tried so far?
Customer: Just trying to figure out wats goin on wit the truck
JA: Anything else you want the equipment mechanic to know before I connect you?
Customer: No
Submitted: 2 months ago.
Category: Medium and Heavy Trucks
Expert:  go-west.. replied 2 months ago.
Good evening
Can I get your engine serial number?
Customer: replied 2 months ago.
73112100
Expert:  go-west.. replied 2 months ago.
Please recheck that code
It doesn't home up
How did you get it?
Customer: replied 2 months ago.
From the dashboard
Customer: replied 2 months ago.
Its saying 509852spn fail 31
Customer: replied 2 months ago.
Any luck
Expert:  go-west.. replied 2 months ago.
the check engine is it on?
Customer: replied 2 months ago.
The check engine , regen and engine protect light on
Expert:  go-west.. replied 2 months ago.
The 509 code is a software error with the ICU.
They have been working on a fix on that one for months
Don't be alarmed with that one
Customer: replied 2 months ago.
It saying spn 412 fail 16 now
Expert:  go-west.. replied 2 months ago.
Exhaust recirculation temperature data correct but moderity highThat's the sensor before the air horn.measures gas temp after the cooler
Customer: replied 2 months ago.
Wats the sensor called
Customer: replied 2 months ago.
Will that shut down the truck and cause it not to regen?
Expert:  go-west.. replied 2 months ago.
Exhaust recirculation temperature sensor
Expert:  go-west.. replied 2 months ago.
No
But it may derate the engine to get the exhaust temperature down to acceptable temperatures
Customer: replied 2 months ago.
Well the engine is cold and i just start it and its doin the same thing
Expert:  go-west.. replied 2 months ago.
Is there any other codes -?
Expert:  go-west.. replied 2 months ago.
Are you using coolant?
Customer: replied 2 months ago.
No other codes and no colant
Customer: replied 2 months ago.
I mean the coolant level is allways full
Customer: replied 2 months ago.
Wat u think
Expert:  go-west.. replied 2 months ago.

sorry for the delay

have a look at the diag for this code,it states that the truck needs to run loaded and unloaded for the code to clear,also look at causes on whats causes this code to happen,.take truck for a ride and see if clears but i see we need a step further and check some components how are you with a wrench ??

https://www.dropbox.com/s/yp1de4pjvwzji7x/123.pdf?dl=0

Customer: replied 2 months ago.
Very good
Customer: replied 2 months ago.
I did a complete egr tune up i change the scr put a new doser valve and had cummins clean the dpf
Expert:  go-west.. replied 2 months ago.

. Check for active fault codes.Active fault codes present other than Fault Code .Check the exhaust gas recirculation (EGR) temperature sensor.

. Check the EGR temperature sensor accuracy.EGR temperature within 10°C [18°F] of ambient air temperature?

.Check the cooling system.

. Check the engine coolant mixture.Engine coolant is proper mixture?

. Check the engine coolant level.Engine coolant level at proper level?

.Check the EGR system.

. Check the EGR differential pressure sensor ports for plugging.Debris or soot found in either EGR differential pressure port?

.Check engine control module (ECM) calibration and clear fault codes.

. Check if an ECM calibration update is available.If a calibration update for this fault code is available, does the ECM contain that revision or higher?

.do you have insite?

Customer: replied 2 months ago.
No
Expert:  go-west.. replied 2 months ago.

let me know if the egr delta p ports are plugged

Customer: replied 2 months ago.
U tink i should try and drive the truck
Customer: replied 2 months ago.
No its not plugged
Customer: replied 2 months ago.
I pulled the differential pressure sensor the egr the map sensor and the turbo pressure sensor already today and clean them and put them back
Customer: replied 2 months ago.
U tink one of those sensor is bad
Expert:  go-west.. replied 2 months ago.

did you look at the inlet on the cooler ? when you worked on it ??

Customer: replied 2 months ago.
Wats the egr drlta p ports?
Customer: replied 2 months ago.
Expert:  go-west.. replied 2 months ago.

The delta ports are under the Delta p sensor by the egr valve

Customer: replied 2 months ago.
No dats not plugged
Customer: replied 2 months ago.
Which cooler the egr or the turbo?
Expert:  go-west.. replied 2 months ago.

egr

check the exhaust side inlet.They tend to get restricted

Customer: replied 2 months ago.
Are u talkin bout the fat blue hose that conects to the intake manifold
Expert:  go-west.. replied 2 months ago.

are you talking about the egr cooler or the egr delta p ??

Customer: replied 2 months ago.
The egr pipe comes from the egr cooler right if its rhat your talkin bout thats clear
Customer: replied 2 months ago.
Wats the egr delta pipe
Customer: replied 2 months ago.
just to be clear we're not talkin bout the turbo intercooler pipe
Expert:  go-west.. replied 2 months ago.

Sorry the egr delta p sensor ports

You said they were clear right ?

thats the sensor ontop of the egr valve

Customer: replied 2 months ago.
The delta pipe is clear
Expert:  go-west.. replied 2 months ago.

No we aren't

Customer: replied 2 months ago.
the ports are clear
Customer: replied 2 months ago.
The egr clear delta p ports clear and the delta pipe clear
Expert:  go-west.. replied 2 months ago.

perfect,Now lets get to the egr cooler

check the exhaust side inlet.They tend to get restricted

Customer: replied 2 months ago.
do i have to remove the egr cooler?
Expert:  go-west.. replied 2 months ago.

No

can you get to the back of it without taking it off ? some you can..also by chance did you ever take the exhaust recirculation temp sensor out and inspect the tip ? i would do that before doing anything else.

Customer: replied 2 months ago.
the ets is that on the dpf filter if so that was checked recently when i had it cleaned
Customer: replied 2 months ago.
The back of my egr cooler connects to the exhaust manifold
Customer: replied 2 months ago.
Where is the temperature sensor located and how many are there
Expert:  go-west.. replied 2 months ago.

https://www.dropbox.com/s/yp1de4pjvwzji7x/123.pdf?dl=0

have a look at the above,The document will you were it is,its by the egr valve

Customer: replied 2 months ago.
I cannot open that drop box
Customer: replied 2 months ago.
Ok so i just started the engine up and all the lights went out beside the regen light but as soon as the engine started to warm up the engine and shut down light came on and shut down the truck
Expert:  go-west.. replied 2 months ago.

OK

THE 412 code will not cause the stop engine light to come on,Please recheck the codes i do believe another code has come up

Customer: replied 2 months ago.
Thats wat it is saying spn 412 fail 16
Customer: replied 2 months ago.
spn 509852 fail 31
Customer: replied 2 months ago.
Do u think if freightliner come and plug up there computer to the truck they might get a different reading
Expert:  go-west.. replied 2 months ago.

If they come down they will able to check the sensor for accuracy

it would be helpfull

Customer: replied 2 months ago.
But i would really like to know which is the temperature sensor
Expert:  go-west.. replied 2 months ago.

oh

its the one beside the egr valve,the connector will be green.

Customer: replied 2 months ago.
Nex to the egr is the delta p
Customer: replied 2 months ago.
On the pipe that comes from the egr cooler to the egr there is one sensor is it that one?

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