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Q: At 60mph the rpms are 4000; normal range 2500 what causes this. on 2001 Lexus RX300

Check engine and VSC light stays on. Mechanic cannot pinpoint the problem.
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What are the specific codes?? There are codes that are being set by both of these lights, as both are a computer system. If your mechanic has not told you the specific codes FIND another shop ASAP.

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Codes are PO330 and C-1201 these are on the invoice. Could not duplicate shifting problem when diagnostic equipment was hooked up and test driving. Not shifting into overdrive.
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The problem you describe suggests the transmission is not working properly. The overdrive may not be applying, the torque converter may not be locking up or the transmission may be slipping internally. You need to have it checked out by someone who know what they are doing. Use repair-pal to find another shop.
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