* Resetting the radio: This usually involves a specific sequence of button presses, often involving holding down certain buttons for a period of time. Consult your owner's manual for the exact procedure for your radio model.
* Resetting the trip odometer: This is usually a simple button press or a combination of button presses on the instrument cluster. Again, check your owner's manual.
* Clearing trouble codes (check engine light): This requires a scan tool, not a simple reset. You'll need to take it to an auto parts store (like AutoZone or Advance Auto Parts) that offers free diagnostic scans, or to a mechanic. Simply disconnecting the battery will *not* clear codes reliably and may cause other issues.
* Resetting the PCM (Powertrain Control Module): This is rarely needed by the average owner and is generally only done by mechanics with specialized tools. Disconnecting the battery for a short period (around 30 minutes) *might* help clear some minor glitches, but it won't be a full reset and may not resolve all issues. This should be a last resort and only after attempting other troubleshooting steps.
In short: Tell me what you're hoping to achieve by resetting the computer, and I can give you more specific instructions. Your owner's manual is your best resource for this information.
