P0121 - Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance

WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 2021 Lincoln Navigator, 2021 Lincoln Nautilus, 2021 Lincoln Corsair, 2021 Lincoln Aviator, and 2021 Ford Transit-350 HD. However, it is still accessible from the selected car via links, so may be relevant.

DTC DESCRIPTION P0121 - THROTTLE/PEDAL POSITION SENSOR/SWITCH A CIRCUIT RANGE/PERFORMANCE

Description:	This DTC sets when the PCM indicates the electronic throttle control (ETC) throttle position (TP) sensor 1 circuit is out of range in either the closed or wide open throttle (WOT) modes.
Possible Causes:	Obstruction in the throttle plate movement TP circuit open Self-test operator error (foot resting on the accelerator pedal during test) Damaged TP sensor Damaged throttle body
Diagnostic Aids:	This concern exhibits a symptom of limited power.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to Pinpoint Test DV.