Engine-Codes - Toyota - P0120 2001 Toyota Highlander

P0120 2001 Toyota Highlander Code - Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction

- Code Popularity: 6,907 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
Table of contents

|What are the Possible Causes of the Code P0120 2001 Toyota Highlander?

  • Faulty Throttle Position Sensor
  • Throttle Position Sensor circuit is open or shorted
  • Throttle Position Sensor poor electrical connection

|How to Fix the P0120 2001 Toyota Highlander Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Code P0120 2001 Toyota Highlander Tech Notes

Very common problem with Toyota models. Before replacing any parts, try cleaning the throttle body and reset the light. If the codes come back, then it will necessary to replaced the throttle position sensor (TPS). Most auto parts sell the TPS for around $60.

|What is the Cost to Diagnose the Code P0120 2001 Toyota Highlander?

Labor: 1.0

The cost to diagnose the P0120 2001 Toyota Highlander code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|When is the P0120 2001 Toyota Highlander Code Detected?

Malfunction is detected when an excessively low or high voltage from the sensor is sent to ECM.

|What are Code P0120 2001 Toyota Highlander Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the P0120 2001 Toyota Highlander Code Mean?

The 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.

Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction

|Need more Information on the P0120 2001 Toyota Highlander Code?

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|Need Help with the P0120 2001 Toyota Highlander Code?

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