Lexus RX300 engine light on with shaking issue on Lexus RX300

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Lexus RX300 owners report experiencing issues when the engine light is on and accompanied by shaking, indicating a serious problem that requires immediate attention. This shaking may be a sign of an engine misfire, which can lead to potential damage to the catalytic converter and oxygen sensors. Owners have noted that a flashing engine light often points to an engine misfire, a severe issue that demands prompt action. Additionally, worn spark plugs and fuel injector problems have been reported as common causes of the engine light illumination and shaking. Some owners also mention that a defective catalytic converter can trigger these symptoms due to improper engine combustion. While less frequently, a loose gas cap has also been identified as a possible reason for the engine light activation. It is crucial for owners to address these issues quickly to prevent further damage and ensure safe driving conditions, and it is advisable to have the vehicle inspected by a qualified mechanic for proper diagnosis and resolution.

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