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Engine-Codes – Toyota – P0120 2009 Toyota Camry

P0120 2009 Toyota Camry Code - Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction

Quick Answer

The P0120 diagnostic trouble code (DTC) for a 2009 Toyota Camry indicates a malfunction in the Throttle Pedal Position Sensor/Switch 'A' Circuit. Common causes include Faulty throttle pedal position sensor, Damaged or corroded wiring/connectors in the sensor circuit, Issues with the ECM or related control modules. 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 2009 Toyota Camry indicates Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction.
Common causes
Common causes include Faulty throttle pedal position sensor, Damaged or corroded wiring/connectors in the sensor circuit, Issues with the ECM or related control modules.
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 17, 2024
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Code P0120 2009 Toyota Camry Description

The P0120 diagnostic trouble code (DTC) for a 2009 Toyota Camry indicates a malfunction in the Throttle Pedal Position Sensor/Switch 'A' Circuit. This sensor is a crucial component of the vehicle's electronic throttle control system, which regulates the amount of air entering the engine. The throttle pedal position sensor detects the position of the accelerator pedal and sends this information to the engine control module (ECM). The ECM uses this data to adjust the throttle opening, fuel injection, and ignition timing to optimize engine performance.

OBDII Code P0120 2009 Toyota Camry - Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction
P0120 2009 Toyota Camry Code - Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction

Common Causes of P0120 2009 Toyota Camry

  1. Faulty throttle pedal position sensor
  2. Damaged or corroded wiring/connectors in the sensor circuit
  3. Issues with the ECM or related control modules
  4. Mechanical obstruction in the throttle pedal assembly
  5. Electrical interference or short circuits in the sensor circuit

Symptoms of P0120 2009 Toyota Camry

  1. Reduced engine performance or power
  2. Hesitation or stalling during acceleration
  3. Unresponsive throttle pedal
  4. Check Engine Light illuminated on the dashboard

How to Fix P0120 2009 Toyota Camry

  1. Begin by diagnosing the specific cause of the malfunction using a scan tool to retrieve the DTC and perform a thorough inspection of the throttle pedal position sensor and its circuit.
  2. Inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections. Repair or replace any faulty components as needed.
  3. Test the throttle pedal position sensor's resistance and voltage output to ensure it is functioning correctly. Replace the sensor if it fails to meet the manufacturer's specifications.
  4. Clear the DTC from the ECM's memory using the scan tool and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnosis may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix P0120 2009 Toyota Camry

The typical repair costs for addressing a P0120 code on a 2009 Toyota Camry can vary depending on the specific cause of the issue and the parts/labour required for the repair. In general, replacing a faulty throttle pedal position sensor can cost between $100 and $200, while addressing wiring or connector issues may range from $50 to $150. The total repair cost, including parts and labour, could range from $150 to $500 or more, depending on the extent of the repairs needed.

What does this mean?

Tech Notes for P0120 2009 Toyota Camry

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 which is built into the throttle body).

When is the Code Detected?

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

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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 2009 Toyota Camry Code

1. What are the common symptoms of OBDII code P0120 in a 2009 Toyota Camry?

- Common symptoms include issues with acceleration, decreased power, stalling, and in some cases, the Check Engine light may illuminate.

2. What does the OBDII code P0120 indicate in a 2009 Toyota Camry?

- The code P0120 indicates a Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction in the vehicle's electronic throttle control system.

3. What are the possible causes of OBDII code P0120 in a 2009 Toyota Camry?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors, issues with the throttle body, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose the cause of OBDII code P0120 in my 2009 Toyota Camry?

- A diagnostic scan tool can be used to read the code and further diagnose the issue by checking the throttle position sensor's voltage, inspecting wiring connections, and testing the throttle body.

5. Can I still drive my 2009 Toyota Camry with OBDII code P0120?

- It is not recommended to drive the vehicle with code P0120 as it can lead to potential safety hazards and further damage to the engine or transmission.

6. How can I repair OBDII code P0120 in a 2009 Toyota Camry?

- Repair methods may include replacing the throttle position sensor, repairing damaged wiring, cleaning the throttle body, or resetting the ECM after addressing the root cause of the malfunction.

7. Will resetting the Check Engine light resolve OBDII code P0120 in a 2009 Toyota Camry?

- Resetting the Check Engine light may temporarily clear the code, but it will not fix the underlying issue causing the Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction.

8. Is it safe to continue driving my 2009 Toyota Camry if the Check Engine light is not illuminated with code P0120?

- It is still not safe to continue driving the vehicle, as the underlying issue causing the code may still exist and could potentially worsen without immediate attention.

9. How much does it typically cost to repair OBDII code P0120 in a 2009 Toyota Camry?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor, excluding diagnostic fees.

10. Can a DIY enthusiast fix OBDII code P0120 in a 2009 Toyota Camry?

- While some aspects of the repair may be DIY-friendly, diagnosing and fixing the root cause of the Throttle Pedal Position Sensor/Switch 'A' Circuit Malfunction may require professional expertise and specialized tools.

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