I have a 2004 LS 430. The VSC, Brake, Check Engine light coming on occasionally. Mechanic unable to diagnose unless lights are on when I bring it in. This has occurred before and after battery failed and was replaced, it went away for 3-4 months. Lights are coming on again and battery sounds like it is weakening. Any ideas out there?
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Dec 6, 2025
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Quote:
Maybe your alternator is on its way out, your mechanic test it to make sure you its charging the correct amountOriginally Posted by azbullpro
I have a 2004 LS 430. The VSC, Brake, Check Engine light coming on occasionally. Mechanic unable to diagnose unless lights are on when I bring it in. This has occurred before and after battery failed and was replaced, it went away for 3-4 months. Lights are coming on again and battery sounds like it is weakening. Any ideas out there?
Driver
Get yourself a code reader. Bought one for less than $30 from Amazon. Then you will get a much better idea as to what the problem is.