To reset a check engine light yourself, disconnect the car battery, then turn on the headlights for a few minutes to drain the remaining energy and cause a hard reset. Finally, reconnect the battery.Continue Reading
Loosen then remove the wire connected to the negative terminal. Then, remove the wire connected to the positive terminal.
Turn on the headlights, and wait a few minutes until there is no electricity remaining in the system.
First, reconnect and tighten the cable to the positive terminal, then do the same for the negative terminal.