Originally Posted by
EUR003act
you CANNOT resest the euros ecu like you can with old school ecus... it has an microchip for memory backup, so disconnecting power will not relearn idle procedures, or a/f maps, or your speedo... from factory the speedo is meant to read lower, as said by others, its a safety thing...
if you want to do an idle relearn, you HAVE to take yor car to a honda dealer/service specialist and get it connected to the PGM... or by one yourself for a couple thousand dollars...
all disconnecting the battery will do, is reset your auto window set up... and possibly your radio presets if you leave it off long enough (neither of mine have ever reset)