ClubLexus - Lexus Forum Discussion - 2008 RX400h won't start when cold

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MarkPoe

Feb 19, 2026 08:52 AM

2008 RX400h won't start when cold

I have a 2008 Lexus RX400h and when it is cold after first start won't restart without disconnecting battery for a few minutes. Says ACU issue on dash, does anyone know where it is located on my car?

highmile5

Feb 20, 2026 05:40 AM

is there a check engine light and did you scan for codes?

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