Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

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

Related Medium and Heavy Trucks Questions
I have a 2015 Mack Pinnacle with MP8 engine, I am getting
I have a 2015 Mack Pinnacle with MP8 engine, I am getting fault code 'SPN 4094 FMI 1: NOx limits exceeded due to Insufficient Diesel Exhaust Fluid Quality'. Have checked for DEF quality, Aftertreatmen… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,288 satisfied customers
After replacing dpf filter sensors and doser valve after
after replacing dpf filter sensors and doser valve after driving 100 miles truck gives code 5246 fmi 16 and 4094 fmi 18 and asks for parked regen. It also said scr performance low engine derate 5 mph … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have a 2015 Mack CXU, just spent $15k at Mack dealer on
I have a 2015 Mack CXU, just spent $15k at Mack dealer on DPF, Knox Sensors, EGR value…left the dealer yesterday and truck is back in Derate. Help!!… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,288 satisfied customers
2015 Volvo vnl d13 Truck has fault code p103c00 fmi n/a
2015 Volvo vnl d13 Truck has fault code p103c00 fmi n/a about 2 weeks ago and derated to 8kmOn tech tool under scr inducment reset… def quality was showing red crossRemoved old def from tank and repla… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,288 satisfied customers
I have mack 2013 cxu mp8 engine have check engine light 5394
i have mack 2013 cxu mp8 engine have check engine light 5394 4 code. replaced nox sensor light came back on. same code. i was told to clean def doser valve spray nozzle. i did that in el paso last nig… read more
Joe Green
Joe Green
66 satisfied customers
I have a 2012 mack chu613 with an mp8 in it it keeps giving
I have a 2012 mack chu613 with an mp8 in it it keeps giving me a scr performace low service scr system and parked regen needed and the truck is derated … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,288 satisfied customers
I have paccar mx13 2013 engine def problem in truck showing
Hi I have paccar mx13 2013 engine def problem in truck showing code p3857 and p3912 pls explain me what's problem … read more
Andrew G.
Andrew G.
Heavy Truck Mechanic
Heavy Duty Equipment - Truck and Transport Mechanic
4 satisfied customers
Welcom,have messaged “service DEF speed limited to 5mph.its
Welcom,have messaged “service DEF speed limited to 5mph.its Volvo 2013,d13,hope that you can help me … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
6,288 satisfied customers
2015 cascadia dd15 spn4364 fmi 18 Knox low conversion why is
2015 cascadia dd15 spn4364 fmi 18 Knox low conversion why is this happening installed two new nox sensors and def awning… read more
Bradey V
Bradey V
Certificate
What is the code SPN4364 FMI18 mean? 2015 freightlier
Got transmission fluid changed on automatic transmission, picked up the truck from the shop this morning and truck started giving this code after few hours of driving.… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
2015 cascadia full of def but low def light flashing and
2015 cascadia full of def but low def light flashing and engine lights comming on codes 4361 scr nox conversion effiency low and 3364 def qualiy… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
Regen Issue on a 2011 Pete 348 (vin:160507) with a Cummins
Regen Issue on a 2011 Pete 348 (vin:160507) with a Cummins ISC (esn:73333964). 123.9 miles ago Insite showed codes 3543 (NOx limits exceeded due to Insufficient Reagent Quality), 3582 (Aftertreatment … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I HAVE A 2015 Freightliner cascadia DD15 with a headache
I HAVE A 2015 Freightliner cascadia DD15 with a headache code 5246 FMI 15 … read more
Expert
Expert
10,510 satisfied customers
Mack mp8 2012 in derate no codes no check engine light no
mack mp8 2012 in derate no codes no check engine light no lightening bolt, service def on information screen won't let us take out of derate… read more
Expert
Expert
10,510 satisfied customers
I have code SPN 5246 FMI 0 on my Volvo D13H 2011 256k miles.
I have code SPN 5246 FMI 0 on my Volvo D13H 2011 256k miles. It says DEF tank low Derate to 5 mph, but my DEF tank is full. I can't clear this code and Tech Tool isn't much help in my diagnosis. Any h… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,886 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
2013 Mack GU713. Engine serial #989613 Model #MP8-415C SCR
2013 Mack GU713. Engine serial #989613 Model #MP8-415C SCR performance low. service SCR system. Engine derated to 5mph Codes are: SPN 5246, SPN 4094 NOX, SPN 5443… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
2012 mack cxu613 mp8 code spn 4094 fmi 1 diagnosed to be acm
2012 mack cxu613 mp8 code spn 4094 fmi 1 diagnosed to be acm ,can I use a acm off another truck to be sure before buying one… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 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