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Engine-Codes – Toyota – P0120 2018 Toyota RAV4

P0120 2018 Toyota RAV4 Code - Throttle / Pedal Position Sensor / Switch 'A' Circuit Malfunction

Quick Answer

The P0120 diagnostic trouble code (DTC) for a 2018 Toyota RAV4 indicates a Throttle/Pedal Position Sensor/Switch 'A' Circuit Malfunction. Common causes include Faulty throttle position sensor, Faulty pedal position sensor, Wiring or connector issues in the sensor circuit. 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 2018 Toyota RAV4 indicates Throttle / Pedal Position Sensor / Switch 'A' Circuit Malfunction.
Common causes
Common causes include Faulty throttle position sensor, Faulty pedal position sensor, Wiring or connector issues in the sensor circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P0120 2018 Toyota RAV4 Description

The P0120 diagnostic trouble code (DTC) for a 2018 Toyota RAV4 indicates a Throttle/Pedal Position Sensor/Switch 'A' Circuit Malfunction. This code is triggered when the Engine Control Module (ECM) detects a discrepancy in the voltage signal from the throttle position sensor or pedal position sensor. These sensors play a crucial role in the operation of the vehicle's electronic throttle control system, which regulates the amount of air entering the engine for combustion.

OBDII Code P0120 2018 Toyota RAV4 - Throttle / Pedal Position Sensor / Switch 'A' Circuit Malfunction
P0120 2018 Toyota RAV4 Code - Throttle / Pedal Position Sensor / Switch 'A' Circuit Malfunction

Common Causes of P0120 2018 Toyota RAV4

  1. Faulty throttle position sensor
  2. Faulty pedal position sensor
  3. Wiring or connector issues in the sensor circuit
  4. ECM software malfunction
  5. Environmental factors such as moisture or corrosion affecting sensor operation

Symptoms of P0120 2018 Toyota RAV4

  1. Reduced engine power
  2. Unresponsive throttle
  3. Stalling or rough idling
  4. Check Engine Light illuminated
  5. Poor fuel efficiency

How to Fix P0120 2018 Toyota RAV4

  1. Begin by diagnosing the specific sensor (throttle or pedal) causing the issue using a scan tool to read live data and pinpoint the malfunction.
  2. Inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the sensor's voltage output using a multimeter to ensure it is within the manufacturer's specified range. Replace the sensor if readings are out of range.
  4. Clear the DTC and perform a test drive to verify that the issue has been resolved. If the code returns, further diagnosis may be required to identify any underlying issues.

Cost to Fix P0120 2018 Toyota RAV4

The typical repair costs for a Throttle/Pedal Position Sensor/Switch 'A' Circuit Malfunction can range from $150 to $400, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

What does this mean?

Tech Notes for P0120 2018 Toyota RAV4

Quite a frequent problem with Toyota models. Before replacing any parts, try cleaning the throttle body and resetting the code. If the code comes back, it will be necessary to replace the Throttle Body Assembly.











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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 2018 Toyota RAV4 Code

1. What are the common symptoms of OBDII code P0120 in a 2018 Toyota RAV4?

- Common symptoms include issues with acceleration, throttle response, and potential stalling of the vehicle.

2. What could cause the Throttle / Pedal Position Sensor 'A' Circuit Malfunction in a 2018 Toyota RAV4?

- Common causes of this code include a faulty throttle position sensor, damaged wiring or connectors, or issues with the throttle body.

3. How can I diagnose the Throttle / Pedal Position Sensor issue in my 2018 Toyota RAV4?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific trouble code and then inspecting the throttle position sensor, wiring, and connectors for any visible damage.

4. Can I drive my 2018 Toyota RAV4 with OBDII code P0120?

- It is not recommended to drive the vehicle with this code present as it can lead to further damage and potential safety hazards.

5. How difficult is it to repair the Throttle / Pedal Position Sensor 'A' Circuit Malfunction in a 2018 Toyota RAV4?

- The repair difficulty can vary depending on the exact cause of the issue, but it typically involves replacing the faulty throttle position sensor or repairing any damaged wiring.

6. Will resetting the OBDII code P0120 in my 2018 Toyota RAV4 resolve the issue?

- Simply resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the Throttle / Pedal Position Sensor malfunction.

7. Are there any tips to prevent OBDII code P0120 from occurring in my 2018 Toyota RAV4?

- Regular maintenance, such as checking and cleaning the throttle body, inspecting wiring connections, and using quality fuel, can help prevent issues with the throttle position sensor.

8. How much does it cost to repair OBDII code P0120 in a 2018 Toyota RAV4?

- The cost can vary depending on the exact cause of the problem, but it may range from $100 to $300 for parts and labor.

9. Can a DIY enthusiast fix the Throttle / Pedal Position Sensor issue in a 2018 Toyota RAV4?

- While some experienced DIY enthusiasts may be able to replace the throttle position sensor themselves, it is recommended to consult a professional for an accurate diagnosis and repair.

10. Will ignoring OBDII code P0120 affect the performance of my 2018 Toyota RAV4?

- Ignoring the code can lead to decreased fuel efficiency, drivability issues, and potential damage to other engine components over time. It is best to address the problem promptly.

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