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I noticed today that my engine hours have practically disappeared. Before having my computer flashed by a dealer for an integrated brake controller install a few weeks ago there were about 1200 hours. The display now shows less than 30. Is the result of the dealer's work? Any harm done?
Most likely the tech reset it when doing the flash update.
I don't see how that could harm but it they don't report it
as being updated you may have title issues later in some
report.
Other than that I don't see any problems with that.
Sounds like the hour doojigger is made to be resettable to keep track of maintenance. Hours is better to go by than miles really. Especially when you have work vehicles that do a lot of idling.