AutoCodes – Toyota – P2102 2005 Toyota Highlander

P2102 2005 Toyota Highlander Code - Throttle Actuator Control Motor Circuit Low

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: P2102 2005 Toyota Highlander indicates Throttle Actuator Control Motor Circuit Low.
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 2,687

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 P2102 2005 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 P2102 2005 Toyota Highlander - Throttle Actuator Control Motor Circuit Low - AutoCodes.com — P2102 2005 Toyota Highlander Code - Throttle Actuator Control Motor Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2102 2005 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 P2102 2005 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 P2102 2005 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 P2102 2005 Toyota Highlander code?

Need more information on how to fix the P2102 2005 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 P2102 2005 Toyota Highlander Code

1. What does the OBDII code P2102 mean on a 2005 Toyota Highlander?

P2102 indicates a "Throttle Actuator Control Motor Circuit Low," meaning the ECM has detected an issue with the electrical circuit controlling the throttle actuator motor.

2. What are common symptoms of the P2102 code on a 2005 Toyota Highlander?

Symptoms may include reduced engine power, poor acceleration, the vehicle going into limp mode, and the Check Engine Light illuminating.

3. What causes the P2102 code to appear on a 2005 Toyota Highlander?

Common causes include a faulty throttle actuator motor, damaged wiring or connectors in the throttle control circuit, or a malfunctioning Engine Control Module (ECM).

4. Can I drive my 2005 Toyota Highlander with the P2102 code?

While the vehicle may still be drivable, it will likely have reduced power and performance. Prolonged driving with this issue could cause further damage, so prompt repair is recommended.

5. How do I diagnose the P2102 code on a 2005 Toyota Highlander?

Diagnosis involves checking the throttle actuator motor, testing the wiring and connectors for continuity or damage, and verifying that the ECM is functioning correctly.

6. How can I fix the P2102 code on my 2005 Toyota Highlander?

Repairs may involve replacing the throttle actuator motor, repairing or replacing damaged wiring or connectors, or, in rare cases, reprogramming or replacing the ECM.

7. Can a dirty throttle body cause the P2102 code on a 2005 Toyota Highlander?

A dirty throttle body is unlikely to directly cause the P2102 code, but cleaning it can help rule out other throttle-related issues.

8. How much does it cost to repair the P2102 code on a 2005 Toyota Highlander?

Repair costs can vary widely, ranging from $100 to $500 or more, depending on whether the issue lies with the throttle actuator motor, wiring, or ECM.

9. Will resetting the Check Engine Light fix the P2102 code on my 2005 Toyota Highlander?

Resetting the light may temporarily clear the code, but the underlying issue must be fixed to prevent the code from returning.

10. Can a bad battery cause the P2102 code on a 2005 Toyota Highlander?

A weak or failing battery can contribute to electrical issues, potentially triggering the P2102 code. Testing the battery and charging system is a good diagnostic step.