To turn off the check engine light in a car, either bring the car in to a mechanic or use a trouble code scanning tool, then fix the problem that is causing the light to be illuminated. If the light stays on and there is no problem with the engine, then disconnect the battery for a while to reset the trouble lights.
When the check engine light is illuminated on a vehicle's dashboard, it means that the vehicle is detecting a problem with the engine that could compromise the function of the vehicle or the safety of the passengers. A local mechanic will be able to diagnose and fix the problem to turn off the check engine light. Otherwise, use the following steps to turn the light off.
- Use a trouble light code scanner to detect the problem
- Disconnect the battery
- Reconnect the battery
Use a code scanner to determine why the light is on. Replace the part that is malfunctioning to make the light turn off. If this does not work, continue to the next step.
Remove the wires from the vehicle to disconnect the car from its power source. Wait for at least 5 minutes.
Reconnect the battery to reset all of the trouble signals in the dash. If there are no problems with the engine, the check engine light should be turned off.