Monitor Description
WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.
This DTC indicates "stuck ON malfunction" or "stuck OFF malfunction" of shift solenoid valve S2.
The ECM controls the gearshifts by turning the shift solenoid valves ON/OFF. When the gear position directed by the ECM and the actual gear position do not match, the ECM illuminates the MIL and stores the DTC.