AutoCodes – Toyota – P2103 2003 Toyota Highlander

P2103 2003 Toyota Highlander 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 2003 Toyota Highlander 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 2,179

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 2003 Toyota Highlander 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 2003 Toyota Highlander - Throttle Actuator Control Motor Circuit High - AutoCodes.com — P2103 2003 Toyota Highlander Code - Throttle Actuator Control Motor Circuit High

What does this mean?

What are the Possible Causes of the DTC P2103 2003 Toyota Highlander?

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 2003 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2103 2003 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 P2103 2003 Toyota Highlander code?

Need more information on how to fix the P2103 2003 Toyota Highlander code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 2003 Toyota Highlander Code

1. What does the OBDII code P2103 mean on a 2003 Toyota Highlander?

P2103 indicates a "Throttle Actuator Control Motor Circuit High," meaning the engine control module (ECM) has detected a high voltage issue in the throttle actuator control motor circuit.

2. What are the common symptoms of the P2103 code in a Toyota Highlander?

Common symptoms include reduced engine power, poor acceleration, erratic idling, an illuminated check engine light, and, in some cases, the engine entering limp mode.

3. What causes the P2103 code to appear on a 2003 Toyota Highlander?

Potential causes include a faulty throttle actuator motor, damaged wiring or connectors in the throttle actuator circuit, a malfunctioning ECM, or electrical issues such as short circuits or corrosion.

4. Can I drive my 2003 Toyota Highlander with the P2103 code?

Driving with the P2103 code is not recommended, as it can lead to reduced performance or potential safety issues due to the throttle not operating correctly.

5. How do I diagnose the P2103 code on my Toyota Highlander?

Diagnosis involves inspecting the throttle actuator motor, checking for damaged or corroded wiring and connectors, and using a multimeter to test the circuit for proper voltage and resistance.

6. How do I fix the P2103 code on a 2003 Toyota Highlander?

Repairs may include replacing the throttle actuator motor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the ECM if itâ€™s faulty.

7. What tools are needed to troubleshoot the P2103 code?

Youâ€™ll need an OBDII scanner, a multimeter, and possibly a wiring diagram for the throttle actuator circuit to properly diagnose and address the issue.

8. Can a dirty throttle body cause the P2103 code?

While a dirty throttle body is not a direct cause of the P2103 code, it can lead to poor throttle operation, which may trigger related issues. Cleaning the throttle body may help if itâ€™s dirty.

9. How much does it cost to repair the P2103 code on a 2003 Toyota Highlander?

Depending on the exact cause, repair costs can range from $100 for wiring repairs to $500 or more for replacing the throttle actuator motor or ECM.

10. Do I need to clear the P2103 code after repairs?

Yes, after completing repairs, use an OBDII scanner to clear the code. Drive the vehicle to ensure the issue is resolved and the code does not return.