Engine-CodesLexus – P2102 Lexus

P2102 Lexus Code - Throttle Actuator Control Motor Circuit Low

Quick Answer

The P2102 diagnostic trouble code (DTC) for Lexus vehicles refers to an issue with the Throttle Actuator Control Motor Circuit being low. Common causes include Faulty throttle actuator control motor, Wiring issues or poor electrical connections in the throttle actuator control circuit, Defective throttle position sensor. 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
P2102 Lexus indicates Throttle Actuator Control Motor Circuit Low.
Common causes
Common causes include Faulty throttle actuator control motor, Wiring issues or poor electrical connections in the throttle actuator control circuit, Defective throttle position sensor.
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.
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P2102 Lexus Description

The P2102 diagnostic trouble code (DTC) for Lexus vehicles refers to an issue with the Throttle Actuator Control Motor Circuit being low. This means that the Engine Control Module (ECM) has detected a lower than expected voltage signal from the throttle actuator control motor circuit. The throttle actuator control motor is responsible for controlling the throttle plate position based on driver input through the accelerator pedal.

OBDII Code P2102 Lexus - Throttle Actuator Control Motor Circuit Low
P2102 Lexus Code - Throttle Actuator Control Motor Circuit Low

Common Causes of P2102 Lexus

  1. Faulty throttle actuator control motor.
  2. Wiring issues or poor electrical connections in the throttle actuator control circuit.
  3. Defective throttle position sensor.
  4. ECM software malfunction.
  5. Environmental factors such as moisture or corrosion affecting the circuit.

Symptoms of P2102 Lexus

  1. Engine hesitation or lack of response when pressing the accelerator pedal.
  2. Rough idling or stalling at low speeds.
  3. Illumination of the Check Engine Light on the dashboard.
  4. Reduced engine power or inability to accelerate quickly.
  5. Increased fuel consumption.

How to Fix P2102 Lexus

  1. Begin by conducting a thorough inspection of the throttle actuator control motor circuit, including wiring and connections, to identify any visible damage or loose connections.
  2. Test the throttle actuator control motor and throttle position sensor using a multimeter to determine if they are functioning correctly.
  3. If the throttle actuator control motor or throttle position sensor is found to be faulty, replace the defective component with a new one.
  4. Clear the diagnostic trouble codes from the ECM using a scan tool and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, consider consulting a professional mechanic or dealership for further diagnosis and repair.

Cost to Fix P2102 Lexus

The typical repair costs for addressing a P2102 Throttle Actuator Control Motor Circuit Low code can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It is important to note that diagnosis time and labor rates at auto repair shops can vary significantly, so it is advisable to obtain quotes from multiple sources before proceeding with the repair. Additionally, factors such as the vehicle's make and model, as well as the location of the repair shop, can also impact the final cost.

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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 P2102 Lexus Code

1. What are the common symptoms of OBDII code P2102 in a Lexus?

- Common symptoms include reduced engine power, engine stalling, rough idling, and difficulty accelerating.

2. What does the OBDII code P2102 in a Lexus indicate?

- The code P2102 indicates a problem with the Throttle Actuator Control Motor Circuit being low.

3. What are the possible causes of OBDII code P2102 in a Lexus?

- Possible causes include a faulty throttle actuator control motor, damaged wiring or connectors, a defective throttle body, or a problem with the engine control module.

4. How can I diagnose the OBDII code P2102 in my Lexus?

- To diagnose the code, you can use an OBDII scanner to retrieve the code and then inspect the throttle actuator control motor, wiring, and connectors for any visible damage.

5. Can I still drive my Lexus with the OBDII code P2102 present?

- It is not recommended to drive your vehicle with the code P2102 present, as it can lead to further damage and potential safety hazards.

6. How can I repair the OBDII code P2102 in my Lexus?

- Repair options may include replacing the throttle actuator control motor, repairing or replacing damaged wiring or connectors, or resetting the engine control module.

7. Can a DIY enthusiast fix the OBDII code P2102 issue in a Lexus?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to troubleshoot and repair the issue. However, seeking professional help is recommended for accurate diagnosis and repair.

8. How much does it cost to repair the OBDII code P2102 in a Lexus?

- Repair costs can vary depending on the specific issue causing the code and the labor rates of the repair shop. It is advisable to get a diagnostic evaluation to determine the exact cost.

9. How urgent is it to address the OBDII code P2102 in a Lexus?

- It is important to address the code promptly to prevent further damage to the vehicle and ensure safe operation. Ignoring the issue can lead to more severe problems down the line.

10. Can the OBDII code P2102 in a Lexus trigger other related codes?

- Yes, the code P2102 can sometimes trigger other related codes, such as P2100, P2101, or P2118, which are all related to throttle actuator control motor circuit issues.

Discuss the causes and fixes for P2102 Lexus OBDII Code

  • VSC light on. Car was starting now it will not start. I originally replaced both knock sensors.

  • You may have a bad Throttle Actuator Control Motor. What model and year is your vehicle?