01Why Resetting the Check Engine Light?

  • Resetting the check engine light can be useful in several situations:
  • - After addressing the issue causing the light to come on, resetting it can confirm if the problem has been resolved.
  • - If the check engine light comes on due to a minor issue or a false alarm, resetting it can prevent unnecessary trips to the mechanic.
  • - Some vehicles may fail a state inspection if the check engine light is on, even if the underlying issue has been fixed. Resetting it can help pass the inspection.

02Identifying the Underlying Issue

  • Before resetting the check engine light, it's important to identify and address the underlying issue. Otherwise, the light may come back on after resetting.
  • To identify the problem, you can:
  • - Use an OBD-II scanner: Plug the scanner into the car's OBD-II port and retrieve the trouble codes. These codes will provide information about the specific issue causing the check engine light to illuminate.
  • - Visit a mechanic: If you don't have access to an OBD-II scanner or are unsure about how to interpret the trouble codes, it's best to take your car to a mechanic. They can diagnose the problem and recommend the necessary repairs or maintenance.

03Steps to Reset the Check Engine Light

  • Once you have addressed the underlying issue, follow these steps to reset the check engine light:
  • Turn off the engine: Ensure the car's engine is fully turned off.
  • Locate the battery: Open the car's hood and find the battery. It is usually located in the engine bay.
  • Disconnect the negative terminal: Use a wrench or socket to loosen the bolt on the negative terminal of the battery. Remove the cable from the terminal and secure it away from any metal parts.
  • Wait for a few minutes: Leave the negative terminal disconnected for at least 5 minutes. This allows the car's computer system to reset.
  • Reconnect the negative terminal: Reattach the cable to the negative terminal and tighten the bolt securely.
  • Start the engine: Start the car's engine and check if the check engine light has been reset. If it remains on, there may still be an unresolved issue.
  • Please note that the steps to reset the check engine light may vary slightly depending on the make and model of your car. Consult your vehicle's manual or contact the manufacturer for specific instructions.

Conclusion

Resetting a car's check engine light can be a helpful step after addressing the underlying issue. However, it's important to remember that resetting the light does not fix the problem causing it to come on. If the check engine light continues to illuminate, it's best to have the vehicle inspected by a professional mechanic to prevent any potential damage or further issues.

MethodsDetails
Step 1Turn off the engine
Step 2Locate the battery and disconnect the negative terminal
Step 3Wait for a few minutes
Step 4Reconnect the negative terminal
Step 5Start the engine and check if the check engine light has been reset
car
check engine light
reset