Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Connect one-on-one with {0} who will answer your question

This answer was rated:

Had to do parked regen after derate. didnt fix the issue. I…

Had to do parked...

Had to do parked regen after derate. didnt fix the issue. I called a roadside tech to come do a forced regen. He did 2 of them and $800 later Im still in derate mode. Tech said that I will have to go to dealer becasue the softeware he has has done everything he can do and dealer software can go deeper into engine to reset codes

Mechanic's Assistant: What's the make/model/year of your truck? Engine type?

15 mack cxu316 mp8

Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 3 minutes by:
11/15/2020
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,458
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. Please allow me a few moments to look over your question and I will be right back with you. Thank you
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
Rgr10-4
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
Unfortunately when the unit is in derate and it will not respond with the switch it has to be reset with a service tool. There are a lot of aftermarket scan tools that can do this.Once in it will say scr derate reset then you can run a forced regen
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
the tech that came out did 2 forced regensgot the soot level down to 19%everything should be ok to get back to normal operation according to the tech, but it isn't and I don't know enough to tell if he's lying or notI tried to disconnect the speed sensor on the back of the transmission to get around the issue and avoid a tow truck but that didn't work either. do you know of any other tricks that I could try?
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
The soot level is only in the dpf system the derate is for the scr system. The regen is ran to tell the engine ecm that the nox levels are normal
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
how can I trick the computer into letting me drive?
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
What transmission do you have in your truck?
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
eaton 10
manual
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
If you disconnect the vehicle speed sensor it will allow you to go over 5 mph it will just limit the rpms unless someone had changed the max engine speed without vss parameter
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
I tried disconnecting that one. Its located on the back of tranny where the driveshaft connects right?
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
that is correct
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
is there another one somewhere or something else that I can disconnect since that 1 didnt' work?it almost seems like the engine still knows how fast its going even tho the sensor is disconnected
Customer reply replied 1 year ago
did you get the pic I sent
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
That is the sensor. Someone must have changed the parameter. There is no other sensor that you can disconnect. That is the only one. This is an emission related issue. That is why they implemented it that wayI would have the “max engine speed without vss” parameter changed to max when you have it looked at. It will prevent this the next time
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
ok so im pretty much a sitting duck until a dealer hooks up to it with his computer then?
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
If that does not work yes. The only other option I can suggest is calling someone out to change that parameter and then you can drive to a dealer
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
can someone other than a dealer change that parameter?
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
if they have the right service tool
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
ok what do I need to ask them exactly, because Im pretty dumb haha
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
If they can change that parameter. They should know
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
ok cool. thanksjust ask them if they can change the parameter in the computer right?
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
that is correct.
No problem. Have a nice day
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,458
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
Ask your own question now
Customer reply replied 1 year ago
you too!
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Mike Mcmillan Your Own Question
Mike Mcmillan
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,458
6,458 Satisfied Customers
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel

Mike Mcmillan is online now

Related Medium and Heavy Trucks Questions
We have a solid dpf light on our Kubota 3950. Kubota 3350
tried to run parked regen several times light goes out when we push it … read more
Tristen J Hamm
Tristen J Hamm
Certified Diesel Technician
3 satisfied customers
Check engine light came on with two codes: FMI 5 and SPN
Check engine light came on with two codes: FMI 5 and SPN 3216 … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,458 satisfied customers
Have SPN 5246 Fmi 16 on a mack. 2011 Mack CXU. Mack mp8. I
Have SPN 5246 Fmi 16 on a mack JA: What's the make, model, and year of your heavy truck? Customer: 2011 Mack CXU JA: What's the engine type and size? Customer: Mack mp8 JA: Is there anything else the … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,458 satisfied customers
Working on a 2015 Mack CHU with MP8. This truck needs
Working on a 2015 Mack CHU with MP8. This truck needs frequent regens when it is doing in town work. The other trucks in the fleet do not seem to need parked regens when this one does. Watched a regen… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have a 2015 mack mp8 engine that will not stay out of
I have a 2015 mack mp8 engine that will not stay out of derate mode says poor def quality service def we have clleaned filters new in and out senseors doser valve put new vavles behind the starter and… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,458 satisfied customers
NOT CAR DIESEL TRUCK MACK 2013. II NEED HELP WITH FAULT
NOT CAR DIESEL TRUCK MACK 2013 JA: What type of fuel do you typically use? When was your last oil change? Customer: II NEED HELP WITH FAULT CODES JA: What's the make/model of your 2013 truck? Customer… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,458 satisfied customers
I'm in 5mph Derate on my 2015 Mack cxu613, MP8 engine. No
I'm in 5mph Derate on my 2015 Mack cxu613 , MP8 engine … read more
Joe Green
Joe Green
70 satisfied customers
2016 Fireghtliner Casadia DD15. 695,000. My check engine
My check engine light came on and DEF light started flashing. My mph started to decline to about 55mph. So i pulled over and did a force regen. Once the force regen has completed I started driving and everything was normal again except the engine light stayed on. The next day it did the exact same thing. My question is what exactly am I expecting to get fixed to prevent to having to keep doing a forced regen?… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
SCR system fault 2013 CHU 613 pinnacle. MP8 505 hp 2013 Mack
SCR system fault 2013 CHU 613 pinnacle JA: What's the make/model/year of your truck? Engine type? Customer: MP8 505 hp 2013 Mack CHU 613 JA: Are you fixing your truck yourself? What have you tried so … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,458 satisfied customers
I have a mack pinnacle and getting code p009a00 After
Hello i have a mack pinnacle and getting code p009a00 After driving it is now saying soot level critically high… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,458 satisfied customers
I'm stuck here with this 2012 Mack with the MP8 Volvo engine
I'm stuck here with this 2012 Mack with the MP8 Volvo engine I have these codes and can't find a way to repair it I can't even force a regen can someone please help. Here is the codes I'm getting on m… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,458 satisfied customers
I hope this finds you well, I'm still working with this 2012
Hi Mike I hope this finds you well, Mike I'm still working with this 2012 Mack CHU613 with the mp8 that you were helping me with we finally got it running I had to replace the ECM and put back the dpe… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,458 satisfied customers
Having issues with a Mack GU18 2014. Customer drove over
Having issues with a Mack GU18 2014. Customer drove over something and ripped off DEF supply line to doseing unit. They replaced the line but truck is stuck in 5mph derate mode. There are no codes, an… read more
Expert
Expert
10,510 satisfied customers
I trying to initiate a Parked Regeneration but it's not
I trying to initiate a Parked Regeneration but it's not working. Any advice? … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have a 2013 mack mru613 with a mp7 engine it has a code
I have a 2013 mack mru613 with a mp7 engine it has a code spn 3490 fmi 12 mack says this is not there code the code description is aftertreatment 1 purge air actuator-bad intelligent device or compone… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
Second opinion] 2014 mack cxu613 MP8 codes P20EE00 AND
Second opinion] 2014 mack cxu613 MP8 codes P20EE00 AND P207F00 REPLACED BOTH NOX SENSOR,NO CODES NOW BUT CAN NOT REGEN AND TRUCK STILL HAS SERVICE DEF ON INFORMATION SCREEN AND IS DERATED… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
2014 mack cxu613 MP8 codes P20EE00 AND P207F00 REPLACED BOTH
2014 mack cxu613 MP8 codes P20EE00 AND P207F00 REPLACED BOTH NOX SENSOR,NO CODES NOW BUT CAN NOT REGEN AND TRUCK STILL HAS SERVICE DEF ON INFORMATION SCREEN AND IS DERATED… read more
Expert
Expert
10,510 satisfied customers
2008 Mack Granite GU 813. MP8 engine. lighting bolt is
2008 Mack Granite GU 813. MP8 engine. lighting bolt is on @ dash. blue regen switch is blinking. performed regen. before and after having dpf filter cleaned both lights are still on.(blinking regen sw… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,756 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Daniel Wilson

Daniel Wilson

6,062 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,353 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

5,115 satisfied customers

worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

2,756 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

Curtis B.

Curtis B.

Technician

1,947 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

cumminsdr

cumminsdr

Mechanic

1,886 satisfied customers

All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

641 satisfied customers

24 years of experience diagnosing & repairing

< Previous | Next >

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x