Engine revving

Hey there! I'm Dusty, part of the RepairPal Car Genius team. It's great to meet you! Even though the check engine light is off, which usually means all's clear, that's not always the case. There can still be codes (and valuable data) in a pending state that the engine control module hasn't confirmed yet Some possible causes could be; a vacuum leak, clogged or malfunctioning idle air control valve, incorrectly installed O2 sensors (particularly if your 4Runner's sensors are bolt-in), dirty mass air flow sensor, potential fuel delivery problems like a clogged fuel filter or failing fuel pump If things haven't smoothed out, it might be time to call a pro. They've got the tools and know-how to dig deeper and find the problem, ensuring your 4Runner runs like a dream again. If you have any other questions or would like help finding a RepairPal Certified shop in your area, call us! 877-913-1554