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:

2008 Mack Granite GU 813. MP8 engine. lighting bolt is

2008 Mack Granite GU...
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 switch,lighting bolt on @ dash). what can it be? . what to look @ next?
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 1 hour by:
2/5/2015
Technician: Jeremy, Certified Truck/Bus Technician replied 7 years ago
Jeremy
Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 4,370
Experience: ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications
Verified
My name is ***** ***** I will assist you with your concerns.
The lightning bolt on the dash means there is en electrical fault on the vehicle. It can be anything electrical causing it to come on. The vehicle will need to be scanned to see what the fault is.
Now on the regen light, blue light is good. Blue flashing light means one of two things. The regen mode has been turned off from auto or the vehicle is in a running regen mode. So make sure that the switch is in the middle setting to make sure the auto regen is on and the regen isn't in "inhibit" mode. The concern light is when it turns yellow and then later starts flashing yellow. Yellow means a regen is needed and flashing yellow means a parked regen is needed. If it flashed yellow and the red shutdown light comes on, then the vehicle need a computer hooked up and a forced regen done.
One other thing, you mentioned the filter was replaced and such. Was the computer hooked to the truck and the soot level rest as well as the regen maintenance rest performed on the vehicle? If not, that is most likely why you have the electrical light. If that isn't reset, the vehicle thinks the vehicle still needs a regen and is running a constant regen mode on the new filter, causing the blue light to remain flashing the entire time you are driving. Reset the filter soot level and the reset on the maintenance will have those lights go out.
Jeremy
Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 4,370
Experience: ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications
Verified
Jeremy and 87 other Medium and Heavy Trucks Specialists are ready to help you
Ask your own question now
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 Jeremy Your Own Question
Jeremy
Jeremy
Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 4,370
4,370 Satisfied Customers
Experience: ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

Jeremy is online now

Related Medium and Heavy Trucks Questions
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
Triage Tech/Shop Foreman
Associates
593 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
Triage Tech/Shop Foreman
Associates
593 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
Triage Tech/Shop Foreman
Associates
593 satisfied customers
Mack 2016 CHU, MP8. Only code is for the daytime head
Mack 2016 CHU, MP8. Only code is for the daytime head lights. No eml or mil on. Checked codes several times and restarted PTT. Truck has Temp system lockout check light on and kicks out of forced rege… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
Dpf problems. 2011 Mack mp7. Called for forced regen....soot
called for forced regen....soot index at 88% failed regen took filter off to get baked and reinstall along with inlet nox sensor and regened it to 0% soot level but yellow inhibit switch is still blinking … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
I have Eng Bh 33, 4_3.2. When turning the ignition switch
Hi, I have Eng Bh 33, 4_3.2. When turning the ignition switch on. Then when I go thru the codes using the push button I get code 6918 spn fail 7. And 3251 spn Fail 16 … read more
Expert
Expert
10,510 satisfied customers
I have a 2008 mack truck with a mack engine its throwing a
I have a 2008 mack truck with a mack engine its throwing a code ppid330 for soot level reset I dont have the volvo software we just cleaned both dpf filters and it will not complete the regen it start… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
2012 mack psid 46 fmi15 replaced both nox sensors and reset
2012 mack psid 46 fmi15 replaced both nox sensors and reset computer iding jaltest … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
2013 Mack Regen temps not not getting high enough to regen.
2013 Mack Regen temps not not getting high enough to regen. … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
Problem with dpf won't regen starts and stops what di you
Problem with dpf won't regen starts and stops what di you think of drilling 1 in wholes in muffler to trick reg computer to thing every thing is ok 2008 mack mp8 engine… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
593 satisfied customers
Need to force regen on Mack MP8. The sensors went out. 2014
Need to force regen on Mack MP8. The sensors went out … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,370 satisfied customers
I recently bought an Isuzu Elf truck PB-NKR81N from JAPAN
I recently bought an Isuzu Elf truck PB-NKR81N from JAPAN NBC Corporation . 4790cc manual 170000 k.m. chassis # NKR81-7049948 3 drive type :***** Received truck late January 2018 and was working fine … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,370 satisfied customers
Regenwont. Stop. Regen. 2011 Mack mp8. Muffler came off had
Muffler came off had that mounted properly. Add ed. DPF. Filter. Cleaner … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have 2008 Mack gu713. The regen light stays on and wants
I have 2008 Mack gu713. The regen light stays on and wants to regen even after finishing a regen. Dealer service cannot figure it out.… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 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
Just wondering what the regen symbol looks like in the co
just wondering what the regen symbol looks like in the co pilot system on a 2016 granite … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,370 satisfied customers
I have a 2012 model t660 with an isx 15 in it regen light is
I have a 2012 model t660 with an isx 15 in it regen light is on. On the dash but no ecm codes… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
Can someone help me on how to regenerate the dpf on a 2008
Can someone help me on how to regenerate the dpf on a 2008 ford lcf.We had it cleaned.Now we need to know how to regenerate the system...… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,886 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

4,370 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