Replacing ECM

[Fast E]

Will replacing ECM alter true mileage?

Thank you.

[Julia2005]

Not sure what you mean by true mileage. I have the workhorse 8.1 and upgraded the ECM with the unit from UltraRV and what a difference. Plus the service is awesome from them as well. I had to end up replacing a defective Mass Air Flow sensor that was detected in the before and after scans. Not sure I got better mileage, but I did not buy my RV to worry about mileage. It is what it is.

[Warhorse6]

Replaced ours twice on our 2016 phaeton with no dash instrument issues at all

[Fast E]

Please forgive my dumb ass. I'll rephrase my question.

When changing your ECM, did the mileage change on your odometer?

Thank you.

[Warhorse6]

No it did not

[Julia2005]

me either.