Dodge

Dodge Repair Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

Have a 03 dodge 2500 5.9 cummings code p0602 replaced ecm 6…

Have a 03 dodge...

Have a 03 dodge 2500 5.9 cummings code p0602 replaced ecm 6 times all dodge ecms with flash to match vin. all power and grounds are good. replaced engine harness new from dodge. new alt new battery's "votage spikes". had dash out looked over all the wiring it all checked out, pulled bed and inspected wiring and tested it all checked out. we have had every harness out and checked every connector still is killing the ecus.

Mechanic's Assistant: Have you checked all the fuses? Do you have a wiring diagram?

Fuses are good relays are good ect. yes we have shopkey pro .

Mechanic's Assistant: Are you fixing your B2500 yourself? What have you tried so far?

We at the shop are fixing it. replaced ecms, harness's, checked every wire with a dmm and visual.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

We have tried every thing we can think of

Show More
Show Less
Ask Your Own Dodge Question
Answered in 7 minutes by:
3/21/2017
Chris
Chris, Shop Foreman
Category: Dodge
Satisfied Customers: 14,874
Experience: Dodge/Cummins and Chrysler Certified Master Tech
Verified

Hello, my name is ***** ***** I will assist you today. Besides the code, are you noticing any performance issues?

Chris

Ask Your Own Dodge Question
Customer reply replied 1 year ago
no sir but on decal it will die. and if it idel's to long the rpms will dip then the truck will rev up then completely die

Ok, I have found a Chrysler Star case that talks about this code. I think you have a fuel/injector issue and not so much an electrical problem. Read this bulletin I found:

STAR Case

Case NumberK13104246

Vehicle Issue-P0602 Typically there is a driveability concern such as low power, hard start or no start concern, etc...;The ECM may have been recently flash updated and / or replaced.

System or ComponentDTC / Error Message;ECM

Recommendation: P0602 is generally an erroneous fault code, disregard the P0602 fault. Perform fuel system flow tests, reference TSB 14-03-06 revision A to diagnose the original engine performance problem.

Modification Date09/30/08 8:42 PM

I can also send you the TSB mentioned above.

Chris

Ask Your Own Dodge Question

Here is the TSB in that link below. Click on it to see it. Hopefully this helps!

Chris

Ask Your Own Dodge Question
Customer reply replied 1 year ago
wile driving it will be fine then on my scanner as soon as the code comes up there is no throttle response and if you let off the pedel it will die. or if you push the clutch in while down shifting "so lets say your in 6th and let off the throttle and push in the clutch it will die". or if you trucker shift "rev match" the down shift it wont die untell about 5mph 1k rpm at a cost "no clutch at all while down shifting then 1k and it will die. ill look at the tsb righ now.

Any after market items on the truck?

Ask Your Own Dodge Question
Customer reply replied 1 year ago
we installed a fass fuel system and pressure to the high pressure pump is really good. on my scan tool the high pressure pump passes for psi. injectors are new aswell. but we installed the fass after the truck came in with the first ecu and the code. to see if it would resolve the problem.

Okay, well if you pull up the code diagnostics, it says ECM or "flash ECM". You have replaced it 6 times, and I don't think this is an ECM at this point. I recommend performing injector flow/return tests. One of those injectors may be returning too much fuel, or you may have an injector pump/FCA issue when the engine temperature gets up there. Time to check the fuel system next.

Chris

Ask Your Own Dodge Question
Customer reply replied 1 year ago
that is weird you say that now. because it will be fine untell it gets to temp. then the problems will start

Just thinking "outside the box" so to speak. Knowing that makes me think that it is not electrical.

Chris

Ask Your Own Dodge Question
Customer reply replied 1 year ago
I agree we needed some outside thought on this ill ckeck what I can hear at the shop and have the injectors sent out for testing.

Sounds good. I think that is the best move. Ignore the code for now and treat this like a performance issue with no codes.

Chris

Chris
Chris, Shop Foreman
Category: Dodge
Satisfied Customers: 14,874
Experience: Dodge/Cummins and Chrysler Certified Master Tech
Verified
Chris and 87 other Dodge Specialists are ready to help you
Ask your own question now
Customer reply replied 1 year ago
will do thank you very much

You are very welcome and thank you for the positive rating! I will keep this post open for a few weeks just in case you have any follow up questions.

Chris

Ask Your Own Dodge Question
Customer reply replied 1 year ago
hello this is Zach I own the shop this truck is being repaired at. initially this truck was bought in Utah, while driving to Idaho the CEL came on and the owner dropped it off at my shop. code was APPS voltage high, no big deal did the flow chart step 2 was replace sensor, replaced sensor code still present. took truck to dodge for ecm flash, flash did nothing. recommended new ecm. got truck back to the shop and dug around a little, in the back seat was a paper with a sales pitch, new tires, new b&w ball..... NEW ECM. called the previous owner. they informed me that was the same code they had when they had the ecm replace right before they sold it. luckily the ecm had warranty we figured we would warranty it out problem solved right. Wrong, had the ecm warranty'd put it on now we had a fueling calibration error. had a local shop flash the ecm with no positive outcome. recommended ecm replacement again off the flow chart. got an ecm out of junk yard Dodge oem numbers! thought maybe this aftermarket ecm company was a joke. wrong again after having vin flashed into ecm back to apps voltage high code. pulled harness checked truck front to back repaired all questionable connections rubs...... replaced fca, crank sensor, cam sensor, fuel rail pressure sensor, alternator, same results, ordered used engine harness, new ecm, pulled dash inspected every inch of wire everywhere. new ecm throws fueling calibration error 602 and number 6 injector fires improperly. installed new pass over connectors to injectors ohmed all wires for short to power or ground. nothing test bad same results. ive seen some crazy things on trucks but this takes the cake. why will an ecm swap change the code from fueling calibration error to apps voltage high. I don't think its injectors but ive been wrong in the past. I have a set available and on the way for tomorrow. also have a new cp3 off a 2005 on my pickup. will the cp3 interchange? I know injectors will not because the spray angle on the nozzles.
This is indeeda good one huh? The 2005 injection pump should be ok to swap onto the 2003. They are the same. Get those injectors checked and get back to me.Chris
Ask Your Own Dodge Question
Customer reply replied 1 year ago
the fca voltage drops and is relating it to the rail pressure to drop tell it dies.

That would make sense. Does it do that with the other ECM's?

Ask Your Own Dodge Question
Customer reply replied 1 year ago
yup everyone

And you have replaced the engine harness correct?

Ask Your Own Dodge Question
Customer reply replied 1 year ago
we have
Ok, let me research this some more and get back to you.
Chris
Ask Your Own Dodge Question

Have you tried swapping the CP3 pump yet?

Ask Your Own Dodge Question
Customer reply replied 1 year ago
if the driver is losing power we don't see how changing the pump will change it.

True. Tell me if you disconnect the connector at the FCA while the rail pressure starts to drop, will the pressure come back up?

Ask Your Own Dodge Question
Customer reply replied 1 year ago
ill check that when we pull the truck back in.
Ok.
Ask Your Own Dodge Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a dodge mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Chris Your Own Question
Chris
Chris
Chris, Shop Foreman
Category: Dodge
Satisfied Customers: 14,874
14,874 Satisfied Customers
Experience: Dodge/Cummins and Chrysler Certified Master Tech

Chris is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

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:

I AM VERY GLAD THAT I TOOK A CHANCE ON YOUR PROBLEM SOLVING SKILLS. I WAS SUCCESSFUL IN REPLACING THE FUEL PUMP. MY TRUCK RUNS LIKE A CLOCK. IT RUNS LIKE THE DAY I BOUGHT IT. NO LUNGING FORWARD, THE TURBO REACTS THE SECOND I STOMP ON THE GAS, AND IT HAS A LOT MORE POWER AND EVEN SOUNDS BETTER TO ME. IT SAVED ABOUT $500.00 BY DOING THE WORK MYSELF. I GIVE YOU ALL THE CREDIT FOR YOUR DIAGNOSING THE PROBLEM, JUST FROM THE SYMPTONS I GAVE YOU OVER THE e MAIL. I WILL USE YOUR WEB SITE AGAIN AND REFER MY FRIENDS. THANKS SO MUCH FOR THE HELP.

TOM WHITTAKERUSA

Just a quick line to tell you how pleased I am to have my brakes working properly after all this time. Your answer was what I needed. I would certainly recommend you highly. God bless!

Rev. Jerry BaysingerHolts Summit, Mo

I recently asked a question about my 2005 dodge ram, and I just wanted to let my Expert know that he hit the nail squarely on the head with his answer. I wanted to thank him again.

GregPittsburgh, PA

Just a quick line to tell you how pleased I am to have my brakes working properly after all this time. Your answer was what I needed. I would certainly recommend you highly. God bless!

JerryHolts Summit, MO

I was skeptical at first but thought I'd give it a try. I was pleasantly surprised. Your site actually is a quality service that I would recommend to others in a heartbeat.

StanSayre, PA

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

< Previous | Next >

Meet the Experts:

Jerry

Jerry

Master Mechanic

1,754 satisfied customers

ASE Master tech, 30 years exp. troubleshooter, driveability tech

Chris

Chris

Shop Foreman

14,874 satisfied customers

Dodge/Cummins and Chrysler Certified Master Tech

Mopar Certified

Mopar Certified

Dodge Technician

6,072 satisfied customers

24 Year Chrysler/Dodge Certified Specialist

moparfl

moparfl

ASE Certified Technician

3,292 satisfied customers

ASE Master Tech Gold level Chrysler Status 30 years dealership exp

Dodgerench

Dodgerench

ASE Certified Technician

2,822 satisfied customers

30+ years Dodge/Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist

Tim Mohr

Tim Mohr

ASE MASTER TECH

2,362 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Don - Mo Lurch

Don - Mo Lurch

Aftermarket & Factory Electronics

1,590 satisfied customers

Cert. Dodge & Chrysler Warnty, Heavy Line Mech, Mobile Electronics. Sales, Installation & Repair for 30 years

< Previous | Next >

Related Dodge Questions
On a Dodge Ram 3500 with a 5.9 Diesel it will start and die
On a Dodge Ram 3500 with a 5.9 Diesel it will start and die and then a long crank but after started will start good rest of day. Codes in system are P0633 and P0480 and P0483 and P0602 and P2122 and P… read more
John Taylor
John Taylor
Automotive Technology
24 satisfied customers
My 1990 Ramcharger will not go into o/d. A mouse had built a
My 1990 Ramcharger will not go into o/d. A mouse had built a nest and broke VSS wire, which I repaired and I have ohmed out entire harness. Still no o/d. It was working fine when I parked it. Also los… read more
sprinkles08
sprinkles08
Technician
High School or GED
17,759 satisfied customers
dodge: I got these smarty codes p1693, p0237, and p0602..already
I got these smarty codes p1693, p0237, and p0602..already changed map sensor but got codes again..dodge 2000… read more
sprinkles08
sprinkles08
Technician
High School or GED
17,759 satisfied customers
RAM 2500 DIESEL 4X4: YES I HAVE A 2003 DODGE TRUCK 5.9 DIESEL
YES I HAVE A 2003 DODGE TRUCK 5.9 DIESEL NOT CHARGING ENGINE STALLING AFTER 30 SEC AFTER STARING REPLACED ALT STILL ON JOY CHECKED WIRING AND BATTERYS CUT THE WIRE TO THE DRIVER AT THE ALT AND PUT IT … read more
Tim Mohr
Tim Mohr
ASE MASTER TECH
Master's Degree
2,362 satisfied customers
dodge 3500 deisal: I have a 2007 dodge 3500 diesel truck.
I have a 2007 dodge 3500 diesel truck. It runs fine until it warms up and then it won't take fuel. I have replaced filters.… read more
Robert R
Robert R
Auto Technician
Vocational, Technical or Trade Scho
4,799 satisfied customers
dodge ram 2500: I have a 2006 dodge Cummings diesel pickup
I have a 2006 dodge Cummings diesel pickup truck 5.9 liter it has a code of 2509 ECM input.I am at a auction. What would be the issue with it and how much would it be to fix it.… read more
Don - Mo Lurch
Don - Mo Lurch
Aftermarket & Factory Electronics
Vocational, Technical or Trade Scho
1,590 satisfied customers
3500: 2006 ram3500 5.9 diesel alt no charge. no power to 2
2006 ram3500 5.9 diesel alt no charge. no power to 2 wire plug at alt power to 4 guage wire at the back… read more
Mopar Certified
Mopar Certified
Dodge Technician
Vocational, Technical or Trade Scho
6,072 satisfied customers
d350 2wd: I have a 1993 dodge d350 5.9 magnum wanting to overcharge,
I have a 1993 dodge d350 5.9 magnum wanting to overcharge, 63000 original miles, wiring like new. 98% of the time voltage regulator will regulate at startup 14.4volts +/- .15 at idle and with or witho… read more
Dodge expert
Dodge expert
ASE MASTER TECH, REPAIR FACILITY OWNER
High School or GED
3,636 satisfied customers
Dodge Ram 2500 Laramie: I have a 2007 Dodge Ram 2500 4x4 Laramie
I have a 2007 Dodge Ram 2500 4x4 Laramie mega cab. This truck is an early 2007- it has the 5.9 Cummings diesel. This truck has always had injector issues. Even from 56000 miles there have been injecto… read more
Thomas
Thomas
Mechanic
High School or GED
1,537 satisfied customers
2004 dodge caravan: 3.3L set code 2305..battery unhooked when the alt.
2004 dodge caravan 3.3L set code 2305 after I changed the alt. I had the battery unhooked when the alt. was changed. I replaced the coil same code came back. I checked the wires going to the coil and … read more
Don Knight
Don Knight
Shop Manager/Technican
Associate Degree
1,471 satisfied customers
dodge: dtc..ecm has been rebuilt and programmed...wiring harness
I have an 04 dodge with a 5.9 cummins it is not firing on clys 1,2,3 with a dtc p2146T. The ecm has been rebuilt and programmed. The wiring harness checks out ok. What could kill all three cylinders?… read more
sprinkles08
sprinkles08
Technician
High School or GED
17,759 satisfied customers
2003 dodge ram 2500: 5.9 Cummins..it wont fire while cranking..spec.
2003 dodge ram 2500 5.9 Cummins (not H/O) 5speed manual... long crank times turned into even longer crank times until eventually it wont fire while cranking. Have code P0602. Took it to the dealer and… read more
snapontech
snapontech
Associate Degree
195 satisfied customers
2003 Dodge: 5.9 cummins..the code comes back to replace ecm
I have a 2003 Dodge 3500 5.9 cummins with a p0602 code. Alldata say to flash the ecm and if the code comes back to replace ecm. I have flashed it and then replaced the ecm and the code comes back alon… read more
Auto Go
Auto Go
Shop Owner
Associate Degree
845 satisfied customers
1999 Dodge: 4wd pu..about 10 seconds..It cranks but does not fire.
I have a 1999 Dodge 2500 4WD PU truck with a 5.9 Cummins. Started normally this AM then after about 10 seconds shut down. It cranks but does not fire. My OBD-ll scanner detected a trouble code P1689 (… read more
Mopar Certified
Mopar Certified
Dodge Technician
Vocational, Technical or Trade Scho
6,072 satisfied customers
2003 dodge ram 3500: auto trans..steady cruise..60 mph..harness going
2003 dodge ram3500 5.9 cummings auto trans. has code p0720,p0514,p0524,p1652, while driving at steady cruise at say 60 mph output rpm's drop to nothing intermitantly and engine rpm,s drop and feels li… read more
Mopar Certified
Mopar Certified
Dodge Technician
Vocational, Technical or Trade Scho
6,072 satisfied customers
DODGE: TURN KEY ON & gauge JUMPS TO BAT VOLTAGE for ipc CHECK
03 DODGE 1500, 5.7 AUTO. ALT GAUGE AT '0' VOLTS. TURN KEY ON & GAUGE JUMPS TO BAT VOLTAGE FOR IPC CHECK, THEN BACK TO '0' VOLTS. ALT HAS 12 V AT FEED. RPM GAUGE SHOWS ENGINE RPM. CODES PRESENT ARE P03… read more
Tim Mohr
Tim Mohr
ASE MASTER TECH
Master's Degree
2,362 satisfied customers
99 Dodge: a 5.9 cummings..overdrive..alternator..wiring
99 Dodge 25000 with a 5.9 cummings, will not charge, will not get overdrive. Ive tried everything to get it to charge and it will not. new alternator, new computer, checked all wiring. ive replaced th… read more
Virtual Wrench
Virtual Wrench
Owner of LJ Auto Repair 37 years
Associate Degree
14,398 satisfied customers
99 Dodge Ram 1500: heads..alternator..at autozone said it sounded
I have a 99 Dodge Ram 1500 pick up, after replacing the heads, we connected a lighter weight black ground wire to the alternator instead of the heavy weight ground wire from the battery, the ground wi… read more
Tim Mohr
Tim Mohr
ASE MASTER TECH
Master's Degree
2,362 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.

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