Have Toyota Questions? Ask a Mechanic for Answers ASAP
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Are there any engine codes? Has the check engine light been on recently? Any recent service history?
Have not replied until now. IF there are no warning lights the most common problem when it comes to idling issues has to do with the IAC or Idle Air Control valve and the throttle body. To start check the adjustment on the throttle cable. If it is good the remove the throttle body and then remove the IAC from the bottom of it and clean the IAC thoroughly with carb and choke cleaner. These are known to get carbon deposits and causes the idle to stick and be erratic.