AutoCodes – Toyota – P2103 2006 Toyota Highlander

P2103 2006 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 2006 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 2,278

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 2006 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 2006 Toyota Highlander - Throttle Actuator Control Motor Circuit High - AutoCodes.com — P2103 2006 Toyota Highlander Code - Throttle Actuator Control Motor Circuit High

What does this mean?

What are the Possible Causes of the DTC P2103 2006 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 2006 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 2006 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 2006 Toyota Highlander code?

Need more information on how to fix the P2103 2006 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 2006 Toyota Highlander Code

1. What does OBDII code P2103 mean on a 2006 Toyota Highlander?

P2103 indicates a problem with the throttle actuator control motor circuit, specifically a high voltage condition, which can affect the electronic throttle system's operation.

2. What are the common symptoms of code P2103 in a 2006 Toyota Highlander?

Symptoms may include reduced engine power (limp mode), poor throttle response, the check engine light turning on, and possibly stalling or difficulty accelerating.

3. What causes the P2103 code to appear on a 2006 Toyota Highlander?

Possible causes include a malfunctioning throttle actuator control motor, damaged wiring or connectors in the motor circuit, a faulty throttle body assembly, or a problem with the engine control module (ECM).

4. Can I drive my 2006 Toyota Highlander with code P2103?

Driving with code P2103 is not recommended, as the vehicle may experience reduced power or throttle issues, potentially leading to unsafe driving conditions.

5. How is the P2103 code diagnosed on a 2006 Toyota Highlander?

A technician will use an OBDII scanner to confirm the code, inspect the throttle actuator motor and its wiring for damage, test the motor's voltage and resistance, and check the ECM for faults.

6. How do you fix the P2103 code on a 2006 Toyota Highlander?

Repairs may involve replacing the throttle actuator control motor, repairing or replacing damaged wiring or connectors, cleaning the throttle body, or reprogramming or replacing the ECM if necessary.

7. Can a dirty throttle body cause code P2103 in a 2006 Toyota Highlander?

While a dirty throttle body is not a direct cause of P2103, it can affect throttle operation and should be inspected and cleaned if necessary during diagnosis.

8. What tools are needed to troubleshoot the P2103 code on a 2006 Toyota Highlander?

Tools may include an OBDII scanner, multimeter for testing electrical circuits, and basic hand tools for accessing and inspecting the throttle body and related components.

9. How much does it typically cost to repair code P2103 on a 2006 Toyota Highlander?

Repair costs can range from $100 to $1,000, depending on the root cause, such as replacing wiring, the throttle actuator motor, or the ECM.

10. Can a bad ECM trigger the P2103 code in a 2006 Toyota Highlander?

Yes, a faulty ECM can misinterpret or fail to properly control the throttle actuator motor, leading to code P2103. However, this is less common and should be considered after ruling out other causes.