2005 Toyota Highlander: Engine runs hard RPM below 3000?

First confirm how the engine is maintained,also are all service maintenance schedule performed on regular time or not.

On this model the shifter has the option to disengage overdrive on the shifter itself.

Try this test/ confirm procedure.



While driving the vehicle at cruising speed approximately 55 to 60 miles an hour disengage this switch on the shifter to disengage overdrive. Does the RPM jump up about 1500 RPM? If it does then you were in fact in overdrive and the RPM and speed settings are normal. If by disengaging the overdrive and the overdrive light off is illuminated and the RPM does not change and stays high then overdrive may not be working correctly. This would be highly unlikely and the check engine light probably would illuminate due to a malfunction in one of the solenoids in the transmission. More than likely you're going to find that everything is normal.But if the check engine light is illuminating on dash,then get the error codes scanned to confirm what the problem.

This details will help.
Thanks.

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