Why has the check engine light turned on in my Chevy Tahoe?

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The "check engine" light in a Chevy Tahoe is a sign that the onboard diagnostics have detected issues like an exhaust leak, misfire, or engine timing problem. It's important to address this promptly to avoid potential problems like overheating or catalytic converter failure. The warning could be as minor as a loose gas cap or more serious, such as excess unburned fuel in the exhaust system. While a flashing light might be due to a faulty spark plug, which is not urgent but should be replaced soon. Other potential triggers for the light include O2 sensor failure, a weak battery, or alternator issues. A professional service center can use an OBDII scanner to pinpoint the problem.

Why has the check engine light turned on in my Chevy Tahoe?

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