SC engine idling uneven

I'm experiencing an engine issue with my 2009 Lexus SC, gasoline engine. It has 183335 km on the clock. The error memory shows a stored error, and the idling is uneven. I suspect it might be a defective engine mount, possibly a faulty cable or plug connection.

4 comment(s)

Sounds like a failed motor mount. I had a similar experience with my old Saab. Same symptoms, uneven idling and eventually, noticeable vibrations. Check the rubber mount for cracks or degradation. Sometimes, it's not the mount itself, but the connection to it.

Interesting. Thanks for sharing your experience. When you say 'connection', do you mean the electrical connection related to the mount, or something else? What kind of Saab was it?

I had the same issue with a Saab 9-3. In my case, it was the connection where the sensor is attached to the mount. Sometimes the cable gets brittle or the plug is loose. I'd recommend taking it to a workshop to get it checked out thoroughly though.

Appreciate the advice. I took it to the shop; turns out it was exactly as you suspected, a defective plug connection causing the issue. Repair cost 95€. All is well now.

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