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paulschulz3

Sequoia hybrid battery sensor issue

My 2023 Toyota Sequoia hybrid with 146,781 km has a sluggish start, like the battery is dying. The lights are weak and flicker at idle. Voltage seems okay off, but dips when cranking. Suspecting a bad battery sensor. Anyone else seen this?

Summary of the thread

A 2023 Toyota Sequoia hybrid exhibited sluggish starts and flickering lights, suggesting a potential battery issue. The voltage appeared normal when off but dipped during cranking, leading to suspicion of a faulty battery sensor. After diagnostics at a shop, the problem was confirmed to be the battery sensor, which was replaced, resolving the starting and lighting issues.

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4 comment(s)

matssilver6

I had similar symptoms on my Sequoia. Have you checked the battery sensor output with a scan tool while the engine is running? What values are you seeing? Intermittent sensor data could point to a faulty sensor.

paulschulz3 (community.author)

Good call. I haven't used a scan tool yet, just a multimeter. What readings did you get from your battery sensor when it acted up? Did the fluctuating values correlate with the light flickering?

matssilver6

Yes, the flickering was definitely linked to the sensor data. The voltage readings were all over the place, completely erratic. I'd suggest taking it to a shop; they can pinpoint the exact problem with diagnostic tools.

paulschulz3 (community.author)

Appreciate the insight! I took it to my local shop as you suggested, and after their diagnostics, they confirmed it was indeed the battery sensor. Replacing it cost me about 315€. Starts like a charm now, and the lights are rock solid. Thanks!

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TOYOTA

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SEQUOIA