AutoCodes – Toyota – P2103 2009 Toyota Prius

P2103 2009 Toyota Prius Code - Throttle Actuator Control Motor Circuit High

Quick Answer

The throttle actuator is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve. Common causes include Dirty throttle body, Faulty Throttle Actuator Control Motor, Throttle Actuator Control Motor harness is open. 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: P2103 2009 Toyota Prius indicates Throttle Actuator Control Motor Circuit High.
Common causes: Common causes include Dirty throttle body, Faulty Throttle Actuator Control Motor, Throttle Actuator Control Motor harness is open.
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 11,642

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 Feb 28, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2103 2009 Toyota Prius Description

The throttle actuator is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve. Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not provided to the ECM. The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the throttle body. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to control the throttle actuator and monitor the throttle opening angle in response to driver inputs.

OBDII Code P2103 2009 Toyota Prius - Throttle Actuator Control Motor Circuit High - AutoCodes.com — P2103 2009 Toyota Prius Code - Throttle Actuator Control Motor Circuit High

What does this mean?

What are the Possible Causes of the DTC P2103 2009 Toyota Prius?

Dirty throttle body
Faulty Throttle Actuator Control Motor
Throttle Actuator Control Motor harness is open
Throttle Actuator Control Motor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2103 2009 Toyota Prius?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2103 2009 Toyota Prius 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 P2103 2009 Toyota Prius code?

Need more information on how to fix the P2103 2009 Toyota Prius 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 P2103 2009 Toyota Prius Code

1. What are the common symptoms of OBDII code P2103 in a 2009 Toyota Prius?

- Common symptoms include the Check Engine Light illuminating, reduced engine power, and potential difficulty accelerating.

2. What does the OBDII code P2103 in a 2009 Toyota Prius indicate?

- The code P2103 indicates a problem in the Throttle Actuator Control Motor Circuit, specifically a high voltage condition.

3. What are the possible causes of OBDII code P2103 in a 2009 Toyota Prius?

- Possible causes include a faulty throttle actuator control motor, wiring issues, poor electrical connections, or a defective throttle position sensor.

4. How can I diagnose the cause of OBDII code P2103 in my 2009 Toyota Prius?

- Diagnosing the issue may involve checking the throttle actuator control motor, inspecting the wiring harness for damage, and testing the throttle position sensor for proper operation.

5. Can I continue to drive my 2009 Toyota Prius with OBDII code P2103?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage and potential safety hazards due to reduced engine power.

6. How can I repair OBDII code P2103 in my 2009 Toyota Prius?

- Repairing this code may involve replacing the throttle actuator control motor, repairing any damaged wiring, ensuring proper electrical connections, or replacing the throttle position sensor if needed.

7. Will resetting the Check Engine Light resolve OBDII code P2103 in my 2009 Toyota Prius?

- Simply resetting the Check Engine Light will not fix the underlying issue causing the code. It is important to diagnose and repair the root cause of the problem.

8. How much does it cost to repair OBDII code P2103 in a 2009 Toyota Prius?

- The cost of repair can vary depending on the cause of the issue, but it may involve parts and labor expenses ranging from $200 to $500 or more.

9. Can a DIY enthusiast fix OBDII code P2103 in a 2009 Toyota Prius?

- Repairing this code may require a certain level of expertise and specialized tools, so it is recommended to consult a professional mechanic for proper diagnosis and repair.

10. Are there any preventive measures to avoid OBDII code P2103 in a 2009 Toyota Prius?

- Regular maintenance, such as checking and cleaning the throttle body, inspecting wiring harnesses for damage, and ensuring proper electrical connections, can help prevent issues leading to this code.