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reinhard_moeller3

Lexus UX Electric Battery Drain

Esteemed Lexus community, I am writing to you today with a concerning issue involving my 2021 Lexus UX electric. With 97137 km on the odometer, I've begun experiencing a heavily discharged battery. The symptoms include an error message displayed within the speedometer, weak and flickering lights, and a stored error code within the vehicle's memory. Furthermore, the battery seems weak when attempting to start the engine. From my research, a defective battery sensor seems to be the likely culprit. Has anyone encountered a similar situation?

Summary of the thread

A 2021 Lexus UX electric vehicle with 97,137 km is experiencing a heavily discharged battery, indicated by error messages, weak lights, and difficulty starting. The issue is suspected to be a defective battery sensor, which can cause parasitic drain. A similar problem was resolved by replacing the faulty sensor, and it is recommended to have the vehicle diagnosed and repaired by a professional to prevent further damage.

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4 comment(s)

marie_williams9

Hey, I also drive a UX. Sounds like you're having the same problem I had a while back. Does the error message mention anything specific, or is it just a generic 'low battery' warning?

reinhard_moeller3 (community.author)

Thank you for your response! The error message is rather vague, simply indicating a malfunction within the electrical system. I have checked the battery's voltage, which appears to be significantly lower than expected. Did your UX exhibit similar behavior before you addressed the problem?

marie_williams9

Yep, that's exactly what mine was doing. The voltage drop was the biggest clue. Honestly, with those symptoms and the mileage you're at, a faulty sensor is a strong possibility. I'd recommend getting it checked out at a reliable workshop. It’s likely a quick fix, but definitely get it diagnosed properly. Don't want to risk damaging anything else.

reinhard_moeller3 (community.author)

I appreciate your advice immensely! I have scheduled an appointment with a trusted mechanic for a comprehensive diagnostic assessment. It appears that the battery sensor was indeed defective, leading to the parasitic drain and subsequent issues. The repair, including parts and labor, amounted to 315€. Thank you again for your invaluable assistance in resolving this matter.

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LEXUS

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UX