AutoCodes – Toyota – P2109 Toyota

P2109 Toyota Code - Throttle / Pedal Position Sensor 'A' Minimum Stop Performance

Quick Answer

The idling speed is controlled by the Electronic Throttle Control System (ETCS). Common causes include Faulty Throttle with Motor Body Assembly, Throttle with Motor Body Assembly harness is open or shorted, Throttle with Motor Body Assembly circuit poor electrical connection. 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: P2109 Toyota indicates Throttle / Pedal Position Sensor 'A' Minimum Stop Performance.
Common causes: Common causes include Faulty Throttle with Motor Body Assembly, Throttle with Motor Body Assembly harness is open or shorted, Throttle with Motor Body Assembly circuit poor electrical connection.
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 26,568

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2109 Toyota Description

The idling speed is controlled by the Electronic Throttle Control System (ETCS). The ETCS is comprised of a throttle actuator, which operates the throttle valve, and a throttle position sensor, which detects the opening amount of the throttle valve. The Engine Control Module (ECM) controls the throttle actuator to adjust the throttle valve opening amount so that the idling speed is maintained at the target idling speed. The Diagnostic Trouble Code (DTC) will be set with the manifold absolute pressure sensor normal and atmospheric pressure 85 kPa (638 mmHg) or more (elevation 1400 m (4592 ft.) or less), when the engine coolant temperature is 45°C (113°F) or less at engine start, the engine is warmed up and conditions for Idle Speed Control (ISC) learning are met, the ISC learning value is approximately 3 times larger than normal even though the intake manifold pressure when idling is normal.

OBDII Code P2109 Toyota - Throttle / Pedal Position Sensor 'A' Minimum Stop Performance - AutoCodes.com — P2109 Toyota Code - Throttle / Pedal Position Sensor 'A' Minimum Stop Performance

What does this mean?

What are the Possible Causes of the DTC P2109 Toyota?

Faulty Throttle with Motor Body Assembly
Throttle with Motor Body Assembly harness is open or shorted
Throttle with Motor Body Assembly circuit poor electrical connection

How to Fix the DTC P2109 Toyota?

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 P2109 Toyota 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 P2109 Toyota code?

Need more information on how to fix the P2109 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2109 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

P2109 2013 Toyota RAV4 — Throttle / Pedal Position Sensor 'A' Minimum Stop Performance
P2109 2014 Toyota RAV4 — Throttle / Pedal Position Sensor 'A' Minimum Stop Performance
P2109 2015 Toyota RAV4 — Throttle / Pedal Position Sensor 'A' Minimum Stop Performance
P2109 2016 Toyota RAV4 — Throttle / Pedal Position Sensor 'A' Minimum Stop Performance
P2109 2017 Toyota RAV4 — Throttle / Pedal Position Sensor 'A' Minimum Stop Performance
P2109 2018 Toyota RAV4 — Throttle / Pedal Position Sensor 'A' Minimum Stop Performance

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 P2109 Toyota Code

1. What are the common symptoms of OBDII code P2109 in a Toyota related to the Throttle / Pedal Position Sensor 'A' Minimum Stop Performance?

The common symptoms include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into limp mode.

2. What are the possible causes of OBDII code P2109 in a Toyota?

The code P2109 in a Toyota is typically caused by a faulty throttle or pedal position sensor, wiring issues, or a problem with the electronic throttle control system.

3. How can I diagnose the Throttle / Pedal Position Sensor 'A' Minimum Stop Performance issue in my Toyota triggering the P2109 code?

You can diagnose the issue by checking the sensor's wiring, testing the sensor's voltage output, and using a scan tool to monitor the sensor's data compared to the actual throttle position.

4. Is it safe to continue driving my Toyota with OBDII code P2109 related to the Throttle / Pedal Position Sensor 'A' Minimum Stop Performance?

It is not recommended to continue driving the vehicle with this code present, as it can lead to potential safety hazards and further damage to the engine.

5. How can I repair the Throttle / Pedal Position Sensor 'A' Minimum Stop Performance issue causing OBDII code P2109 in my Toyota?

To repair the issue, you may need to replace the faulty sensor, repair any damaged wiring, or recalibrate the electronic throttle control system as per manufacturer's recommendations.

6. Will resetting the OBDII code P2109 in my Toyota make the issue go away permanently?

Simply resetting the code will not fix the underlying problem causing the P2109 code. It is essential to diagnose and address the root cause of the issue for a permanent solution.

7. Can a dirty throttle body or intake system cause OBDII code P2109 to appear in a Toyota?

Yes, a dirty throttle body or intake system can disrupt the proper functioning of the throttle position sensor and contribute to triggering the P2109 code.

8. Are there any maintenance tips to prevent OBDII code P2109 related to the Throttle / Pedal Position Sensor 'A' Minimum Stop Performance in a Toyota?

Regularly cleaning the throttle body, ensuring proper wiring connections, and using high-quality fuel can help prevent issues with the throttle position sensor and the P2109 code.

9. How long does it typically take to repair the Throttle / Pedal Position Sensor 'A' Minimum Stop Performance issue causing OBDII code P2109 in a Toyota?

The repair time can vary depending on the exact cause of the issue. Simple sensor replacements may take a couple of hours, while more complex wiring repairs or system recalibrations may take longer.

10. Can a DIY enthusiast with automotive knowledge fix the Throttle / Pedal Position Sensor 'A' Minimum Stop Performance issue leading to OBDII code P2109 in a Toyota?

While some aspects of the repair, such as sensor replacement, may be doable for a DIY enthusiast, diagnosing and addressing complex electronic throttle control system issues may require professional expertise and specialized tools.