it can cause the car not to start.
It is a part of the throttle body. You have to replace the throttle body if faulty.
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.
faulty throttle position sensor?
The throttle position sensor determines the amount of throttle used when the engine is running at various speeds. If the sensor is faulty, it can be replaced by ordering a new part.
PO122 indicates the throttle position sensor (TPS) is faulty
That is one possibility for that complaint
Misfire is usually caused by faulty wires or spark plugs or both. Throttle position sensor failure generally causes poor response to the throttle. That is poor acceleration, slow to return to idle and rough idle.
Faulty throttle position sensor
How can you repair the throttle position
I had a similar problem with a Toyota where it was sending the code for Throttle Position Senser I replaced it twice It ended up being the computer that was faulty [[Hope this will help
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.