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Q: Not shifting into overdrive

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My Lexus won't shift into overdrive.

A: This transmission is electronically shifted...

This transmission is electronically shifted. Possible causes of no overdrive include a faulty transmission range switch, valve body, faulty overdrive brake, or faulty ECM. Faults codes should be read out with a scanner, and statuses read. You may want to enlist the help of a mechanic who will have the test equipment, the wiring diagram, and expertise to diagnose the overdrive issue.

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