Here's why:
* Codes are stored in the ECU (Engine Control Unit). The ECU is a computer that controls various engine functions and stores diagnostic trouble codes (DTCs). Disconnecting the battery does not affect the information stored in the ECU.
* Resetting the ECU. While disconnecting the battery for a prolonged period (typically 15-30 minutes) will reset the ECU, it will not clear the stored codes.
* Code reader required. To clear codes from your Chevy truck, you will need a code reader or scan tool that can communicate with the ECU.
To clear codes on your Chevy truck:
1. Obtain a code reader or scan tool. These devices can be purchased from auto parts stores or online.
2. Connect the code reader to your truck's diagnostic port. The port is usually located under the dashboard, near the steering column.
3. Follow the instructions on the code reader. This will typically involve selecting your vehicle's make, model, and year.
4. Retrieve the codes. The code reader will display any stored DTCs.
5. Clear the codes. Most code readers have an option to clear codes.
6. Test drive the truck. After clearing the codes, it's important to test drive the truck to see if the issue has been resolved.
Note: Disconnecting the battery for a short period can reset some of the vehicle's systems, but it will not clear stored codes. If you need to clear codes, it's best to use a code reader or scan tool.
