when I go up a grade, my gauges and dash sensors go crazy. Why?
I have a 2001 lexus ls 430. Whenever I go up a grade my rpm gauge goes up and down and all my sensors on the dash light up. When I pull over and turn off the car for a few minutes. It's fine. I took the car in twice to the lexus dealer. They replaced the chip twice and still can't find the problem. It worries me when I have to drive on my long distance trips up a grade. It only happens whenever I go up one.
Sounds like a short which may only be grounding out when the vehicle is going up a grade. I can't believe the chip would cause the issue repeatedly if it has already been replaced. Suggest having them look for a short in the wiring harness.
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