Quote:
Originally Posted by shimmy2
your cars OBD2 computer (all cars built after 1996) already logs everything. engine rpm, airbag deployment, speed, error codes, check engine light trips, etc. only way to clear its memory is to disconnect the battery terminal for about an hour
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Not true on the clearing of data.
We just bought a new scanner for our shop that will pull historical data no matter how long the battery is disconnected. Disconnecting the battery only clears recently set error data, usually stuff that turns on a check engine light.