Toyota RAV4 engine light, 4WD and VSC lights on, motor issues with poor idling and no power on Toyota RAV4

Some Toyota RAV4 owners report experiencing simultaneous illumination of the engine light, 4WD light, and VSC light, often accompanied by motor issues such as poor idling and loss of power. These warning lights may indicate various problems, including a loose gas cap, faulty oxygen sensor, or issues within the anti-lock braking, emissions, stability, or four-wheel-drive systems. Additionally, some owners have identified a loose vacuum hose as a cause, which can lead to rough idling and decreased acceleration due to a vacuum leak. The persistent illumination of these lights, especially if accompanied by a loss of power, could signal a serious issue that necessitates professional attention, as simply restarting the engine may only provide a temporary fix. It is crucial for owners to monitor the check engine light closely and seek help if it begins to flash, as this could indicate a more urgent problem.