How can I reset my check engine light on my 96 mustang? I replaced the O2 sensor that was bad but even though I disconnected the batter for a few minutes it still hasnt gone away.. have I just not left the battery disconnected long enough?
A few minutes is more than enough to clear the code. If it's still on there is still a problem. Make sure you have reconnected the connector (just in case) and check all other connectors under the hood. If you have a scanner, check the codes again.