Hyundai Tucson: Accelerator Position Sensor (APS)

Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Engine Control - Fuel System / Accelerator Position Sensor (APS)


Accelerator Position Sensor (APS) is installed on the accelerator pedal module and detects the rotation angle of the accelerator pedal. The APS is one of the most important sensors in engine control system, so it consists of the two sensors which adapt individual sensor power and ground line. The second sensor monitors the first sensor and its output voltage is half of the first one. If the ratio of the sensor 1 and 2 is out of the range (approximately 1/2), the diagnostic system judges that it is abnormal.



Circuit Diagram

Circuit Diagram

Harness Connector

Harness Connector



  1. Connect the diagnostic tool on the Data Link Connector (DLC).
  2. Switch "ON" the ignition.
  3. Measure the output voltage of the APS 3 and 6 at C.T and W.O.T.

Specification : Refer to "Specification"


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