i bought a 96 accord about a month and half ago and both odometers werent working. i was going to fix it later and to fix it you apparently have to go to a speedometer service place and get it certified. i got all other engine problems fixed and the odometer magically started working again. you might just need a maintenance. the bad thing about my situation is that i travelled 40 mins away to buy another instrument cluster and ended up not using it.