ludwig_moon31

Lexus SC engine stalls at idle

My 2003 Lexus SC with a gasoline engine is having issues. The check engine light is on, it stalls at idle, and engine power is reduced. Could this be a faulty car sensor? What could be the issue?

A 2003 Lexus SC is experiencing stalling at idle, reduced engine power, and an illuminated check engine light. The issue may be linked to a faulty fuel volume regulator, potentially caused by a defective high-pressure fuel pump. It is recommended to have a professional workshop diagnose and repair the problem, as confirmed by a repair that addressed both the pump and regulator.

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4 comment(s)

I had almost the exact same symptoms on my SC. Have you checked your fuel volume regulator? It might be a similar cause!

Thanks, that’s helpful. Where is it located, and is it something I can fix myself, or should I take it to a professional?

The fuel volume regulator is connected to the high pressure fuel pump which could cause this issue. Given the symptoms you described, you should definitely have a workshop check it out with their diagnostic tools.

Thank you, that confirms my suspicion. I took the car to the workshop, and they confirmed the high pressure pump was defective, which damaged the fuel volume regulator. The eventual repair cost came to 1510€. I will keep an eye on fuel efficiency and misfires in the future.

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LEXUS

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