Toyota 4Runner: P0720 → OSS Circuit → Malfunction
P0720 is a generic OBD II trouble code, which means that it has the same meaning for your Toyota 4Runner as it would any other vehicle. It indicates that your 4Runner’s OSS (Output Shaft Speed Sensor) is reporting a malfunction. It’s typically caused by a bad OSS, or a wiring problem. The OSS works by … Read more