-Purchased 2005 Dodge 2500 5.9 in June 125,560 miles on odometer from out of town Chrysler Dodge dealer

-Scanned with Launch X-431 Torque showed mileage: 174,603 stored in PCM (local Chrysler dealer confirmed storage location is PCM today)


-Subsequent scans with our Launch after driving more miles show the same mileage: 174,603

-We noticed our Launch would not pull VIN unless we selected Dodge, 2005, 16 pin connection, and then select auto scan at which point it would pull the VIN

- Our Launch scanner has read several other cars with exact match between computer and odometer and miles accumulate normally

-PCM and SKIM read "NO FAULT"

-Our Launch scanner does show one active Front Control Module (FMC) Adjustable Pedals Systems Relay Output circuit Open FAULT

-Local Chrysler dealer scanned with Wi Tech 2, mileage registered 0 miles

-Independent shop scanned with Snap-on Zeus, "Pre Scan Vehicle System Report" does not show mileage, also would not pull VIN electronically

-We are working with local Chrysler dealer to determine if PCM is original. The manufacture date was less than 30 days from truck manufacture date.


-Odometer appears to work normally


Possibilities:

-Odometerwas rolled back or instrument cluster was changed without reprogramming PCM correctly which crashed the PCM which is why it is stuck reading 174,603

-PCM failed in way that caused our scanner to read 174,602, Chrysler’s Wi Tech 2 scanner to read 0 yet is not triggering a FAULT code.

-Something else we have not considered



Questions:

-What other possibilities are we missing?

-Why does our Launch read 174,603 and the Wi Tech 2 read 0?

-Why is our Launch reading frozen at 174,603?

Quite the puzzle from our perspective, we will follow the evidence where ever it leads, there may well be non nefarious explanations we haven't considered, if so terrific, if not, we will redress that too.


The key is to determine actual mileage or learn this is not knowable but know which components have been tampered with or otherwise are inoperable.


Thanks,

David

 

What did the service history report say that you can get from dealer warranty records? What does the carfax report say about registration mileage records?

 

Excellent points:

-We have not investigated warranty files but will as a result of your suggestion

- We do have an Experian AutoCheck report which shows ownership change January 1, 2011 at 74,550 miles, thus, if we take the mileage of our purchased (125,560 - 74,550) / 8.43 = 6,051 miles a year, half average (our purchase date was June 6, 2019). As you are alluding, this was/is a circumstantial red flag.

Our focus here is the technical side, explicitly determining:

-How many miles are actually demonstrably on the truck determined from scanning the computer system, which in this case, we have yet to garner definitive knowledge of how this data is gathered and stored. It may be initially stored in the body control module and transferred to the Electronic Control Module which is where our Launch scanner is pulling the 174,603 mileage, but we are not certain this is the correct understanding, and hopeful a professional or otherwise more knowledgeable technician can edify us with the issue.

-Why the local Chrysler dealer's Wi Tech 2 reads out 0 mileage? Perhaps this is a factory programed code to flag tampering with the electronic module storing mileage?

-How best we identify and independent shop that either verify our 1734,603 mileage, the Chrysler Wi Tech 2 zero mileage, or that both are wrong with an explanation of what is actually the case.

Thanks for your comments, we are fascinated with the complexity of this matrix, particularly why the onboard computer system has frozen giving two different readouts!

David