AutoCodes – Toyota – P0120 2006 Toyota Highlander

P0120 2006 Toyota Highlander Code - Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction

Quick Answer

The throttle position sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty Throttle Position Sensor, Throttle Position Sensor circuit is open or shorted, Throttle Position Sensor poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0120 2006 Toyota Highlander indicates Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction.
Common causes: Common causes include Faulty Throttle Position Sensor, Throttle Position Sensor circuit is open or shorted, Throttle Position Sensor poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 5,944

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0120 2006 Toyota Highlander Description

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.

OBDII Code P0120 2006 Toyota Highlander - Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction - AutoCodes.com — P0120 2006 Toyota Highlander Code - Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0120 2006 Toyota Highlander?

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

How to Fix the DTC P0120 2006 Toyota Highlander?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code 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?

Labor: 1.0

To diagnose the P0120 2006 Toyota Highlander code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0120 2006 Toyota Highlander code?

Need more information on how to fix the P0120 2006 Toyota Highlander code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0120 2006 Toyota Highlander Code

1. What does OBDII code P0120 mean for a 2006 Toyota Highlander?

Code P0120 indicates a Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction in your vehicle.

2. What are the common symptoms of a P0120 code in a Toyota Highlander?

Common symptoms of a P0120 code may include issues with acceleration, decreased power, poor fuel efficiency, and the Check Engine light illuminating on the dashboard.

3. What are the possible causes of a P0120 code in a 2006 Toyota Highlander?

Potential causes of a P0120 code in a Toyota Highlander include a faulty throttle position sensor, damaged wiring or connectors related to the sensor, or issues with the throttle pedal position sensor circuit.

4. How can I diagnose the source of a P0120 code in my Toyota Highlander?

To diagnose a P0120 code, you can use an OBDII scanner to retrieve the code and then inspect the throttle position sensor, wiring, and connectors for any visible damage or wear. You may also need to perform a voltage test to determine the exact issue.

5. Can I continue driving my Toyota Highlander with a P0120 code?

It is not recommended to continue driving your Toyota Highlander with a P0120 code, as it can lead to further damage to the throttle system and affect the vehicle's performance and safety.

6. How can I repair a P0120 code in my 2006 Toyota Highlander?

Repairing a P0120 code in a Toyota Highlander may involve replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, or resetting the code after fixing the underlying issue.

7. Is it possible to reset a P0120 code in a Toyota Highlander without fixing the problem?

Resetting a P0120 code without addressing the underlying issue will only temporarily clear the code. The Check Engine light will likely reappear once the system detects the persistent problem.

8. How much does it typically cost to repair a P0120 code in a Toyota Highlander?

The cost of repairing a P0120 code in a Toyota Highlander can vary depending on the exact cause of the issue, the labor rates in your area, and whether you choose to DIY or take it to a professional mechanic.

9. Are there any preventive measures to avoid a P0120 code in a Toyota Highlander?

To prevent a P0120 code in your Toyota Highlander, it's essential to perform regular maintenance checks, address any throttle-related issues promptly, and avoid driving aggressively or rough terrain that can strain the throttle system.

10. Can a P0120 code in a Toyota Highlander be related to other engine problems?

While a P0120 code specifically relates to the throttle pedal position sensor circuit malfunction, it may also be interconnected with other engine issues that affect performance, fuel efficiency, and overall drivability of the vehicle.