What might be the reason for the check engine light in my 2004 Chevy Malibu to illuminate?

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There are various reasons why the check engine light might come on in your 2004 Chevrolet Malibu. Rather than guessing, it's best to retrieve the diagnostic trouble code (DTC) that your vehicle's computer is reporting. You can use a scanner or visit an AutoZone where they typically provide this service for free. One common cause is a loose or worn gas cap, which can trigger a sensor that detects gas vapors. Tighten or replace the cap as needed. Other potential issues could include a faulty oxygen sensor, mass air flow sensor, ignition coils, vacuum hoses, catalytic converter, or spark plugs. To accurately address the problem, it is important to obtain the diagnostic code to pinpoint the specific issue.

What might be the reason for the check engine light in my 2004 Chevy Malibu to illuminate?

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