Inspection Procedure
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
If DTC P1120 - INFORMATION CODES 106, 109, 110, 111, 112, 113 OR 114 is output, check and replace the accelerator pedal position sensor. See PRIUS And REMOVAL & INSTALLATION (PRIUS) .