Instruments - Fuel Mileage Display Reset Procedure
Turning the Current Fuel Mileage Display On and OffThe procedure listed in '03-05 Civic Hybrid 0/Ms to turn the current fuel mileage display on and off needs a bit of tweaking. As written, you're told in step 3 to press and hold the SELECT/RESET knob for about 10 to 15 seconds and then to release it.
To turn the display either on or off, you really need to press and hold that knob for at least 10 seconds but not more than 15 seconds and then release it. If you hold the knob for more than 15 seconds, the display doesn't respond. And one more thing: although the 0/M may say to do so, you don't really need to set the parking brake for this operation. In the interest of safety, however, it's a good practice to set it just the same.