P0221 INFINITI – Throttle/Petal Position Sensor Circuit Range/Performance Problem

P0221 INFINITI Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light),No throttle response

P0221 INFINITI Possible Causes

Faulty Electric Throttle Control Actuator,Electric Throttle Control Actuator harness is open or shorted,Electric Throttle Control Actuator poor electrical connection

P0221 INFINITI Description

Electric Throttle Control Actuator consists of throttle control motor, throttle position sensor (TPS), etc. The throttle position sensor responds to the throttle valve movement. The throttle position sensor has the two sensors. These sensors are a kind of potentiometers which transform the throttle valve position into output voltage, and emit the voltage signal to the Engine Control Module (ECM) In addition, these sensors detect the opening and closing speed of the throttle valve and feed the voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition.