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I have 2003 kenworth t300 with cat 3126 will not start was
Good morning I have 2003 kenworth t300 with cat 3126 will not start was running just died no voltage at heui pump tach inop no codes … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
Would like to start diagnosing a problem with my 3126 using
Would like to start diagnosing a problem with my 3126 using cat man … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
I have a 2006 Peterbilt 387 with a cat c15 acert. Will crank
I have a 2006 Peterbilt 387 with a cat c15 acert. Will crank but will not start. Will start with Starter fluid. Found the 20 amp fuse coming off batteries. But the wire is broken under the frame. Can … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
2001 Peterbilt 3126 Cat Engine, no start condition also
2001 Peterbilt 3126 Cat Engine , no start condition also diagnostic tool won't communicate with ECM… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
CAT 3126 freightliner sport chassis. Just quit while
CAT 3126 freightliner sport chassis. Just quit while driving. Acts like its not getting fuel. We checked the fuel pump all was good. Mechanic said something made the ECM hot and shorted out and melted… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
I have a 2003 GMC 7500 with a 3126 cat, truck came in no
Hello, I have a 2003 GMC 7500 with a 3126 cat, truck came in no start no crank, could not communicate with ecm, checked power and grounds found all ok, replace ecm, now I can communicate with ecm and … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
I have a safari magnum with a cat 3126. engine serial number
Hello, I have a safari magnum with a cat 3126. engine serial number 1wm06869. Customer said he was driving and the engine just shut off. engine will crank fine but won't start. Checked fuel quality an… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
2001 GMC T8500 with CAT 3126, intermittent check engine
2001 GMC T8500 with CAT 3126, intermittent check engine light, engine loss of power after running for aprox 1 hours. Can not connect with Prolink Ultra, can not see any modules on the network. No wiri… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 2004 F650 xl super duty with a CAT 3126. It will
I have a 2004 F650 xl super duty with a CAT 3126. It will crank but no start. The wait to start light will not illuminate on dash. Need fuse box schematics and any info on why this is happening.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
C15 acert cut off going down road, will turn over but wont
C15 acert cut off going down road, will turn over but wont start. ET will not communicate with ECM. Has battery power for laptop but wont connect. Has ignition power at ECM but doesnt have ignition po… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
2000 freightliner FL70 wit Cat 3126 that will not start. My
2000 freightliner FL70 wit Cat 3126 that will not start. My scanner will not communicate with the ECM. I'm thinking the ECM is not getting power or its no good. Is there a common problem? I checked al… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
Im working on a 2001 cat 3126. Died while driving cranks but
Im working on a 2001 cat 3126. Died while driving cranks but no start. No communication on pro link. engine serial #ckm19576… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
I am working on and 06 Pete 379 with a Cat C-15 MXS24605.
I am working on and 06 Pete 379 with a Cat C-15 MXS24605. The truck came in with a no start concern, died while driving down a rough road. Driver states it has new batteries and alternator in the last… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
1998 freightliner FL70 truck,cat engine 3126 bin sitting about
1998 freightliner FL70 truck,cat engine 3126 bin sitting about 9 months, put new batteries in it new fuel filters cranks over fine,wont start. spray starting fluid it fires but wont run,i was thinking… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
I need a wiring diagram of the pin input and out puts on a
I need a wiring diagram of the pin input and out puts on a 3126 Cat its in a Freightliner 1FVACXAK93HK20610. SERIAL#CKM54644. WONT START WILL NOT COMMUNICATE! I really want to check power and grounds … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
Hello have a 2003 F450 with a cat 3126 serial HEP22256 Check
Hello have a 2003 F450 with a cat 3126 serial HEP22256 Check engine light never comes on at all not even at KOEO. No communication with ecm with snap on pro-link- or et program. Unit just shut off dri… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
I have a 2009 peterbilt model 378, with a c-13 LEE18461, I
I have a 2009 peterbilt model 378, with a c-13 LEE18461, I have power on pins 52, 53, and 70, and ground on 65 and 67. I ordered a new ECM, installed the reman, and I continue to get a j1939 code on t… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
05 ford f650 cat 3126 engine stalled while warming up now brake
05 ford f650 cat 3126 engine stalled while warming up now brake light on and engine heater not working. wont start. tried unhooking batteries for half hour and hooking back up no help. my scan tool wo… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,245 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

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Curtis B.

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Chris (aka-Moose)

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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.

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