Here's why and what you should do instead:
* The light indicates a Diagnostic Trouble Code (DTC): The check engine light illuminates because the car's computer has detected a problem and stored a diagnostic trouble code. This code points to a specific issue, even if that issue isn't currently causing noticeable symptoms. The problem might be minor now, but could worsen over time.
* Ignoring it risks further damage: A seemingly minor issue, like a loose gas cap or a failing oxygen sensor, can lead to significant damage if left unaddressed. Ignoring the light increases the risk of costly repairs later.
* Temporary fixes are unreliable: There are ways to temporarily turn off the check engine light (disconnecting the battery, using an OBD-II scanner to clear codes), but this only masks the underlying problem. The light will likely come back on.
What you SHOULD do:
1. Get the code(s) read: Use an OBD-II code reader (available relatively inexpensively at auto parts stores) to retrieve the Diagnostic Trouble Code(s) stored in your car's computer. This will tell you exactly what the car's computer detected.
2. Research the code(s): Once you have the code(s), you can research them online (many websites offer DTC lookup) to understand the potential problem(s).
3. Address the underlying issue: Based on your research, you can determine if the problem is something simple you can fix yourself (like tightening a gas cap) or if you need to take it to a mechanic.
4. If you have it professionally diagnosed and repaired: After repairs are completed, the mechanic should clear the code. If the problem was correctly addressed, the light will stay off.
Turning off the check engine light without addressing the underlying problem is like ignoring a warning sign. It might seem inconvenient in the short term, but it could save you considerable expense and trouble in the long run.
