What are the reasons for the malfunction indicator light in the Buick Excelle?

1 Answers
Nevaeh
07/30/25 2:18am
The reasons for the engine malfunction indicator light in the Buick Excelle are as follows: 1. Exhaust emissions not meeting standards: Issues such as poor fuel quality, failure of the catalytic converter, excessive carbon buildup in the intake manifold, clogged fuel injectors, malfunctioning oxygen sensors, or occasional engine misfires can all cause the engine malfunction light to illuminate. Among these, poor fuel quality is the most common cause; replacing the catalytic converter can resolve this. 2. Poor engine system performance: The malfunction light may illuminate due to poor engine system performance, such as faults or poor connections in the throttle pedal sensor, throttle position sensor, mass air flow sensor, or crankshaft position sensor. These issues require repair or replacement according to relevant maintenance methods. 3. Transmission malfunction: In some vehicles, transmission system issues, such as internal transmission faults, slipping, or overheating, are also indicated by the engine malfunction light. These problems require inspection and repair at a service center.
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