You should not simply reset the check engine light. Resetting it without addressing the underlying problem will only temporarily hide the issue. The problem will likely persist, potentially causing further damage to your car.
How to diagnose the problem:
1. Get the Diagnostic Trouble Code (DTC): You'll need to get the code stored in the car's computer. You can do this in a few ways:
* OBD-II Scanner: The most reliable method is to use an OBD-II scanner (available at most auto parts stores). Plug it into your car's OBD-II port (usually under the dashboard), and it will read the DTC.
* Auto Parts Store: Many auto parts stores will read the code for free.
* Mechanic: A mechanic will diagnose the problem and provide a much more thorough check.
2. Interpret the Code: Once you have the code, you can look it up online (many websites offer DTC databases) or in a repair manual for your specific car model. This will give you an idea of what the problem might be.
3. Fix the Problem: Based on the DTC, you can try to fix the problem yourself (if you're mechanically inclined) or take your car to a mechanic.
How to reset the check engine light (AFTER fixing the problem):
Once the problem is fixed, you can reset the light. The method varies slightly depending on the car, but here are a couple of common ways:
* Disconnect the Battery: Disconnect the negative terminal of your car battery for about 15-20 minutes. This will reset the computer. Reconnect the battery and start the car. The light should be off, but may take a few driving cycles to completely extinguish.
* OBD-II Scanner: Most scanners have a "clear codes" function. Use this to clear the codes after you've fixed the issue.
Important Note: If the check engine light comes back on after resetting it, the problem hasn't been solved. You need to have the car properly diagnosed and repaired. Ignoring the check engine light can lead to significant damage and expensive repairs in the future.
