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It says temp system lockout check in the dash indicator. 2…

Customer Question
It says temp system...

It says temp system lockout check in the dash indicator

Mechanic's Assistant: Is the indicator light blinking or flashing, or is it solid? When did you first notice it?

2 weeks ago it popped up as a alert and never popped up again

Mechanic's Assistant: What's the make, model, and year of your car?

2015 mack truck gu713

Submitted: 7 months ago.Category: Medium and Heavy Trucks
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Answered in 1 minute by:
12/20/2021
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 7 months ago
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,445
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’d like to try and help. I am sorry that you are having issues with your truck. I know this can be frustrating. Please allow me a few moments to look over your question and I will be right back with you. Thank you
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Customer reply replied 7 months ago
Ok
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 7 months ago

On your question, the temp lockout is located in the after treatment menu. This means simply that the unit is not available for a regen. This is mostly due to the soot level not being high enough for a regen. It can also mean that there is a fault code currently present in the system. If the check lamp is not currently on then the issue has gone away and the soot level is not high enough for a manual parked regen and in normal operation.

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Customer reply replied 7 months ago
Ok thanks a lot. So it's nothing to worry about
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 7 months ago
that is correct. My pleasure. Have a good day
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Customer reply replied 7 months ago
When I go inside the aftertreatment system it still says temp system check but the alert haven't popped up since 2 weeks ago when it first popped up and also I didn't warm my truck up that morning I just started it and drove off
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 7 months ago
it will state that until the soot level is high enough to do a parked forced regen
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Customer reply replied 7 months ago
Is that bad that the soot level is not high enough
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 7 months ago

No not at all. The truck will regen by itself the vast majority of the time. The soot level being low is a good thing

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Customer reply replied 7 months ago
Ok thanks. I just purchased this 2015 and not familiar with the system. Thanks for your time
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 7 months ago

No problem

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Customer reply replied 7 months ago
Aye bro are you sure the temp system lockout check isn't caused by the soot level being to high and the dpf filter needing to be cleaned
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 7 months ago
Can you please send me a picture of what you are seeing in the dash?
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Customer reply replied 7 months ago
I'm not in the truck but when I go to the after treatment section it says (temp system lockout check)
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 7 months ago
On the temp lockout, that only means the unit is not ready for a regen. With the message you have that popped up, that means that you have an exhaust after treatment fault code that is active
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Customer reply replied 7 months ago
Ok thanks
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