Pedal position error. Most likely to much difference between MAIN and BACKUP of pedal positions.
Note: In the event of an E-throttle error code, all E-throttle outputs are disabled and the throttle body reverts to its mechanical rest (failsafe) position. No other ECU limitations are applied. Because the throttle is uncontrolled in this state, a slightly elevated idle speed is normal and expected in limp-home mode.