P0123 2002 TOYOTA COROLLA - Throttle Position Sensor/Switch 'A' Circuit High Input 3ZZ-FE Engine
P0123 2002 TOYOTA COROLLA Possible Causes
- Faulty throttle position sensor
- Throttle position sensor harness is open or shorted
- Throttle position sensor circuit poor electrical connection
Cost of diagnosing the P0123 2002 TOYOTA COROLLA code
Labor: 1.0The cost of diagnosing the P0123 2002 TOYOTA COROLLA code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
When is the P0123 2002 TOYOTA COROLLA code detected?An excessively high voltage from the Throttle Position Sensor (TPS) is sent to Engine Control Module (ECM).
P0123 2002 TOYOTA COROLLA Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0123 2002 TOYOTA COROLLA MeaningThe Throttle Position Sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.