How to reset check engine light without disconnecting battery


Resetting the check engine light without disconnecting the battery typically involves using an OBD-II scanner or performing specific procedures

1. Use an OBD-II scanner, which can be plugged into the vehicle's OBD-II port (usually located under the dashboard near the driver's seat).

OBD-II Scanner

2. Similar to an OBD-II scanner, a code reader can be used to retrieve and clear trouble codes. Connect the code reader to the OBD-II port and follow the device's instructions.

Code Reader

3. Consult your vehicle's owner's manual for specific instructions on how to reset the check engine light.

Vehicle-specific Procedure

4. Complete a specific drive cycle recommended by your vehicle manufacturer. This may involve driving the vehicle under certain conditions, such as a combination of city and highway driving

Drive Cycle

5. Unplug the OBD-II connector, wait for a few minutes, and then reconnect it. This may reset the check engine light

Disconnect and Reconnect the OBD-II Connector

6. Some smartphone apps, when paired with a compatible OBD-II Bluetooth adapter, can read and clear trouble codes.

Use a Smartphone App

7. Locate the fuse for the check engine light in the vehicle's fuse box. Remove the fuse, wait for a short period, and then reinstall it. This may reset the light.

Check Engine Light Fuse

8. Start the engine and let it idle for a few minutes. Some vehicles automatically perform a self-check and may reset the check engine light during this time.

Idle the Engine

9. Before attempting to reset the check engine light, make sure the underlying issue that triggered the light has been addressed.

Ensure the Issue is Resolved

10. If you're unsure or uncomfortable performing the reset yourself, consult a professional mechanic or an auto service center.

Professional Mechanic or Auto Service