* Reset the PCM (Engine Computer): This is usually done to clear trouble codes or resolve minor glitches. The most common method is to disconnect the negative (-) terminal of the battery for about 30 minutes. This allows the computer to power down completely and reset its memory. Reconnect the battery afterwards. *Be aware that this will erase radio presets and possibly other personalized settings.*
* Reset a specific system (like the radio): Some systems have their own reset procedures. For the radio, consult your owner's manual.
* Reset the trip odometer: This is usually done using buttons on the instrument cluster. Check your owner's manual for the specific instructions.
* Deal with a more serious issue: If you're experiencing a major problem, disconnecting the battery might not be sufficient. You'll likely need to use a scan tool to diagnose and address the underlying issue. A mechanic or an OBD-II code reader will be helpful.
In short, disconnecting the negative battery terminal for 30 minutes is the most likely solution if you mean resetting the main engine computer. However, be sure to consult your owner's manual for more specific instructions and to rule out other possibilities.
