Lexus IS transmission sensor fault

I'm having trouble with my 2009 Lexus IS diesel. At 43714 km, both the engine and transmission warning lights are on. Diagnostics point to a transmission oil pressure sensor fault. The gearbox goes into emergency mode, slips during gear changes, shifts roughly, and makes grinding noises. It looks like the gearbox oil might be low. Has anyone else had this happen?

4 comment(s)

I had something similar with my IS. Almost the same symptoms: engine warning light, rough shifting, and then limp mode. Low oil could be it. Have you checked the level yourself? What did you find?

Thanks. I haven't checked the oil level yet. I wanted to get some info first. Did checking/adjusting the oil fix it for you, or did you need more work done?

Topping off the oil didn't completely fix it. The problem was still there. I took it to a shop. They confirmed the sensor fault and recommended replacing it. I'd suggest doing the same to prevent more damage.

Thanks for the advice. I took it to a workshop, and they confirmed the pressure sensor fault. Replacing the sensor and adding transmission oil cost 365€, and it fixed the problem.

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