ANSWER: Need make, model and year to be able to tell you how to reset the throtle position.
Throttle position sensor out of range.
Throttle Position sensor out of range
How can you repair the throttle position
A Throttle Position Sensor (TPS) reports to the ECM how open the throttle is. The signal is sent as voltage to the ECM, and the amount of voltage reports how open the throttle is. The throttle is what allows gasoline to get to the engine, and in a car that is the gas pedal. We would think fo the value as 0% to 100% and any range between.
The function of a throttle position sensor is to monitor the position of the throttle in an internal combustion engine.
The throttle position sensor is in the throttle body.
code po121 means Throttle Position Sensor/Switch A Circuit Range/Performance Problem . it is usually indicative of a faulty throttle position sensor or faulty wiring harness in the engine bay.
The throttle position sensor is located on the throttle body at the end of the throttle shaft.
The throttle position sensor is on the throttle body, opposite of where the cables attach.
Generally speaking the throttle position sensor is on the throttle body.
The throttle position sensor is on the throttle body on the opposite side of the cables.
The throttle position sensor is located on the throttle plate.