Lexus LS Climate Control AUC Sensor Fault

I have a 2023 Lexus LS with a gasoline engine and the blower motor is inoperative. Diagnostics point to a fault with the AUC sensor, maybe a bad cable or plug. The car has 147448 km. Any ideas?

4 comment(s)

Interesting. I had a similar problem with my 2018 BMW 5 Series. The air quality sensor went haywire, and the entire climate control system shut down. Have you checked the connector and wiring harness leading to the AUC sensor for any damage or corrosion?

I've visually inspected the connector and wiring, but didn't do a continuity test. Could you tell me about the diagnostic steps you took with your BMW?

Sure. On the BMW, the fault codes pointed to the AUC sensor. I used a multimeter to check for voltage at the sensor connector and found none. I traced the wiring back and found a break in the harness. Given your symptoms and the diagnostic code, it's likely a similar wiring or connector issue. I ended up taking it to a workshop.

Thanks for the help. I took it to a technician, and it was a faulty connector at the AUC sensor, like you thought. It cost 95€.

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