zlacker

>>cwwc+(OP)
> When he sold the truck, his buyer hooked it up to a computer that told them the real mileage was around 400,000 miles.

I’m not knowledgeable about odometers at all, but if it’s as easy as “hooking up to a computer” to get the real mileage, why don’t people do that when they buy the trucks?

>>oefrha+l4
By 'hooking up to a computer', one tampers odometers in the first place. That's how leased cars' odometers are tampered by some lessees.

>>rainco+G5
This comment was not clear. Odometer in car computer can be changed too. There exists special obd command to do this (when you need to replant ECU between engines), but you need to have a password (which is provided with "official" diagnostic computers/tools). If car has no mechanical odometer (most new passenger cars today don't), this is the only way to change odometer values.

>>yetihe+ne
This is not how odometers are scammed. The EEPROM gets rewritten to zero, then you can increment the odometer to your preferred value via OBD/UDS. Please note that you can only increment the odometer without a specialized (authenticated) diagnostic session.

FYI I do not reset odometers, I am on the other side, developing software for instrument clusters.