AutoCodes – Toyota – P2112 2003 Toyota Highlander

P2112 2003 Toyota Highlander Code - Throttle Actuator Control System - Stuck Closed

Quick Answer

The throttle actuator is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve using gears. Common causes include Throttle Body Plate Binding, Faulty Throttle Actuator, Throttle Actuator harness is open or shorted. 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: P2112 2003 Toyota Highlander indicates Throttle Actuator Control System - Stuck Closed.
Common causes: Common causes include Throttle Body Plate Binding, Faulty Throttle Actuator, Throttle Actuator harness is open or shorted.
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 2,455

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 P2112 2003 Toyota Highlander Description

The throttle actuator is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve using gears. 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 to control the throttle actuator and set the throttle valve angle in response to driver inputs.

OBDII Code P2112 2003 Toyota Highlander - Throttle Actuator Control System - Stuck Closed - AutoCodes.com — P2112 2003 Toyota Highlander Code - Throttle Actuator Control System - Stuck Closed

What does this mean?

What are the Possible Causes of the DTC P2112 2003 Toyota Highlander?

Throttle Body Plate Binding
Faulty Throttle Actuator
Throttle Actuator harness is open or shorted
Throttle Actuator circuit poor electrical connection

How to Fix the DTC P2112 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 P2112 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 P2112 2003 Toyota Highlander code?

Need more information on how to fix the P2112 2003 Toyota Highlander 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 P2112 2003 Toyota Highlander Code

1. What does OBDII code P2112 mean on a 2003 Toyota Highlander?

P2112 indicates that the throttle actuator control system is stuck in the closed position, preventing proper air intake into the engine.

2. What are the common symptoms of P2112 in a 2003 Toyota Highlander?

Symptoms include reduced engine power, difficulty accelerating, a stuck throttle, the Check Engine Light turning on, and potentially the vehicle entering limp mode.

3. What causes the P2112 code to appear on a 2003 Toyota Highlander?

Common causes include a faulty throttle body, carbon buildup on the throttle plate, a damaged throttle actuator motor, wiring issues, or problems with the engine control module (ECM).

4. Can I drive my 2003 Toyota Highlander with a P2112 code?

Driving with a P2112 code is not recommended as it can result in limited engine performance and unsafe driving conditions.

5. How do I fix the P2112 code on a 2003 Toyota Highlander?

Repairs may involve cleaning the throttle body, inspecting and repairing wiring or connectors, replacing the throttle actuator motor, or, in rare cases, replacing the ECM.

6. How much does it cost to fix a P2112 code on a 2003 Toyota Highlander?

The cost can range from $100 for a throttle body cleaning to $1,000 or more if the throttle body or ECM needs replacement, depending on parts and labor.

7. Can a dirty throttle body cause the P2112 code?

Yes, carbon buildup on the throttle plate can cause it to stick closed, triggering the P2112 code.

8. How do I clean the throttle body on a 2003 Toyota Highlander?

Remove the throttle body, use a throttle body cleaner and a soft brush to remove carbon deposits, and ensure the throttle plate moves freely before reinstalling.

9. Does a bad throttle position sensor trigger the P2112 code?

While not the primary cause, a faulty throttle position sensor can contribute to issues with the throttle actuator, potentially causing the P2112 code.

10. Will resetting the Check Engine Light fix the P2112 code?

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