DTC P0121-04: Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance - System internal failures: Action
WARNING: This page is about a different car, the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, 2016 Land Rover Range Rover, 2014 Land Rover Range Rover, and 2013 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
- Vehicle Conditions to enable DTC Logging Strategy
- During electric throttle adaption process at ignition ON engine OFF the amplifier is checked
- Check engine control module for additional DTCs and refer to relevant DTC index. Rectify these first
- Check and install a new engine control module, only when diagnosed as failed
- Using the manufacturer approved diagnostic system clear all stored DTCs using the 'Diagnosis Menu' tab and retest