AutoCodes – Subaru – P2109 Subaru

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

Quick Answer

The Powertrain Control Module (PCM) monitors the electronic throttle for the ability of the throttle plate to reach the lower mechanical stop position within a calibrated amount of time at ignition ON. Common causes include Obstruction in the throttle plate movement, Faulty Electronic Throttle Body (ETB). 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 Subaru indicates Throttle/Pedal Position Sensor 'A' Minimum Stop Performance.
Common causes: Common causes include Obstruction in the throttle plate movement, Faulty Electronic Throttle Body (ETB).
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 8,160

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 Oct 25, 2021

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

The Powertrain Control Module (PCM) monitors the electronic throttle for the ability of the throttle plate to reach the lower mechanical stop position within a calibrated amount of time at ignition ON. The P2109 code sets if the throttle plate does not reach the lower mechanical stop position within a calibrated amount of time.

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

What does this mean?

What are the Possible Causes of the DTC P2109 Subaru?

Obstruction in the throttle plate movement
Faulty Electronic Throttle Body (ETB)

How to Fix the DTC P2109 Subaru?

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 Subaru 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.

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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 P2109 Subaru Code

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

- 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 Subaru?

- The code P2109 in a Subaru is often caused by a faulty throttle position sensor, issues with the pedal position sensor, wiring problems, or a malfunctioning electronic throttle control system.

3. How can I diagnose OBDII code P2109 in my Subaru?

- Diagnosing code P2109 typically involves using a scan tool to read the code, checking the throttle and pedal position sensor readings, inspecting the wiring for any damage, and testing the electronic throttle control system.

4. Can I still drive my Subaru with OBDII code P2109 present?

- It is not recommended to drive your Subaru with code P2109 present as it can lead to unsafe driving conditions and potential further damage to the engine or transmission.

5. What are some repair tips for fixing OBDII code P2109 in a Subaru?

- Repair tips for code P2109 include replacing the faulty throttle or pedal position sensor, repairing any damaged wiring, and resetting the electronic throttle control system.

6. How much does it cost to repair OBDII code P2109 in a Subaru?

- The cost of repairing code P2109 in a Subaru can vary depending on the specific cause of the issue, but it may range from a few hundred dollars to over a thousand dollars if professional diagnosis and repairs are required.

7. Is it possible to reset OBDII code P2109 in a Subaru without repairing the issue?

- While you can clear the code using a scan tool, it is not recommended to do so without addressing the underlying problem, as the issue will likely reoccur and can lead to further damage.

8. Will disconnecting the battery reset OBDII code P2109 in a Subaru?

- Disconnecting the battery may temporarily clear the code, but it is not a reliable method to fix the underlying issue causing code P2109 in a Subaru.

9. Can a DIY mechanic fix OBDII code P2109 in a Subaru?

- Depending on the root cause of the code, some DIY mechanics may be able to fix code P2109 by replacing the throttle or pedal position sensor themselves. However, professional diagnosis may be necessary in some cases.

10. How long does it take to repair OBDII code P2109 in a Subaru?

- The repair time for code P2109 in a Subaru can vary based on the cause of the issue and the complexity of the repair. It may take anywhere from a couple of hours to a full day at a repair shop.