AutoCodes – Toyota – P2102 2004 Toyota Prius

P2102 2004 Toyota Prius 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 2004 Toyota Prius 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,626

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P2102 2004 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 P2102 2004 Toyota Prius - Throttle Actuator Control Motor Circuit Low - AutoCodes.com — P2102 2004 Toyota Prius Code - Throttle Actuator Control Motor Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2102 2004 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 P2102 2004 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 P2102 2004 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 P2102 2004 Toyota Prius code?

Need more information on how to fix the P2102 2004 Toyota Prius code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2102 2004 Toyota Prius code diagnosed by a professional: Find a repair shop in your area

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 2004 Toyota Prius Code

1. What does the OBDII code P2102 mean for a 2004 Toyota Prius?

The code P2102 indicates a problem with the Throttle Actuator Control Motor Circuit being low in a 2004 Toyota Prius.

2. What are common symptoms of the P2102 code in a 2004 Toyota Prius?

Common symptoms of the P2102 code include reduced engine power, rough idling, and the vehicle going into "limp mode."

3. What are possible causes of the P2102 code in a 2004 Toyota Prius?

Possible causes of the P2102 code include a faulty throttle actuator control motor, wiring issues, or a problem with the throttle position sensor.

4. How can I diagnose the P2102 code in a 2004 Toyota Prius?

Diagnosing the P2102 code may involve checking the throttle actuator control motor's wiring, connectors, and the motor itself for any signs of damage or malfunction.

5. Can I still drive my 2004 Toyota Prius with the P2102 code present?

It is not recommended to drive your Toyota Prius with the P2102 code present, as it can lead to further damage and compromise driving safety.

6. How can I repair the P2102 code in a 2004 Toyota Prius?

Repairing the P2102 code may involve replacing the throttle actuator control motor, repairing any damaged wiring, or recalibrating the throttle position sensor.

7. Is it possible to reset the P2102 code in a 2004 Toyota Prius without repairs?

Resetting the P2102 code without addressing the underlying issue may temporarily turn off the check engine light, but the problem will likely resurface.

8. Can a DIY enthusiast fix the P2102 code in a 2004 Toyota Prius?

While some may attempt DIY repairs for the P2102 code, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair.

9. How much does it cost to fix the P2102 code in a 2004 Toyota Prius?

The cost of fixing the P2102 code in a 2004 Toyota Prius can vary depending on the root cause of the issue, parts needed, and labor rates at your chosen repair shop.

10. Will the P2102 code cause permanent damage to a 2004 Toyota Prius if left unrepaired?

Leaving the P2102 code unrepaired can potentially lead to more severe issues over time, so it is advisable to address the problem promptly to prevent further damage.