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P1173 Volkswagen Code - Throttle Actuation Potentiometer Signal 2 Signal Too High

Quick Answer

The P1173 diagnostic trouble code (DTC) in Volkswagen vehicles indicates that the Throttle Actuation Potentiometer Signal 2 is reading too high. Common causes include Faulty throttle actuation potentiometer, Wiring or connector issues, Malfunctioning throttle body. 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
P1173 Volkswagen indicates Throttle Actuation Potentiometer Signal 2 Signal Too High.
Common causes
Common causes include Faulty throttle actuation potentiometer, Wiring or connector issues, Malfunctioning throttle body.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1173 Volkswagen Description

The P1173 diagnostic trouble code (DTC) in Volkswagen vehicles indicates that the Throttle Actuation Potentiometer Signal 2 is reading too high. The throttle actuation potentiometer is a sensor that monitors the position of the throttle valve in the engine. It sends signals to the engine control module (ECM) to inform it about the throttle position, which is crucial for determining the amount of air and fuel to be injected into the engine for combustion. When the signal from the throttle actuation potentiometer is too high, it means that the throttle valve is opening more than it should, which can lead to a variety of performance issues.

OBDII Code P1173 Volkswagen - Throttle Actuation Potentiometer Signal 2 Signal Too High
P1173 Volkswagen Code - Throttle Actuation Potentiometer Signal 2 Signal Too High

Common Causes of P1173 Volkswagen

  1. Faulty throttle actuation potentiometer
  2. Wiring or connector issues
  3. Malfunctioning throttle body
  4. ECM malfunction
  5. Mechanical obstruction in the throttle valve

Symptoms of P1173 Volkswagen

  1. Rough idling
  2. Engine stalling
  3. Reduced fuel efficiency
  4. Engine misfires
  5. Limp mode activation

How to Fix P1173 Volkswagen

  1. Perform a thorough inspection of the throttle actuation potentiometer, wiring, and connectors for any signs of damage or wear.
  2. Test the throttle body for proper functionality and clean it if necessary to remove any debris or carbon buildup.
  3. Check the ECM for any fault codes or reprogramming needs related to the throttle actuation potentiometer signal.
  4. Replace the throttle actuation potentiometer if it is found to be faulty, and recalibrate it as per manufacturer specifications.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix P1173 Volkswagen

The typical repair costs for addressing a P1173 code in a Volkswagen vehicle can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is recommended to check local rates for a more accurate estimate before proceeding with the repair.

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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 P1173 Volkswagen Code

1. What are the common symptoms of OBDII code P1173 in a Volkswagen related to the Throttle Actuation Potentiometer Signal 2 being too high?

The common symptoms include poor engine performance, rough idling, stalling, and potentially an illuminated check engine light.

2. What are the possible causes of OBDII code P1173 in a Volkswagen indicating a high Throttle Actuation Potentiometer Signal 2?

Possible causes include a faulty throttle position sensor, issues with the throttle body, wiring problems, or a malfunctioning engine control module (ECM).

3. How can I diagnose the cause of OBDII code P1173 in my Volkswagen myself?

You can use a diagnostic scanner to read the code and then inspect the throttle position sensor, throttle body, and wiring connections for any visible damage or issues. Additionally, performing a throttle body cleaning may help resolve the problem.

4. Can I continue driving my Volkswagen with OBDII code P1173 present?

It is not recommended to drive your vehicle with this code as it can lead to poor engine performance, potential stalling, and other safety concerns. It's best to address the issue promptly.

5. Will resetting the OBDII code P1173 in my Volkswagen make it go away permanently?

Resetting the code may temporarily clear the check engine light, but if the underlying issue causing the code is not addressed, it is likely to return. It's important to diagnose and repair the problem to prevent further issues.

6. How much does it typically cost to repair OBDII code P1173 in a Volkswagen related to the Throttle Actuation Potentiometer Signal 2 being too high?

The cost of repair can vary depending on the specific cause of the code and whether you choose to fix it yourself or take it to a mechanic. It's best to get a diagnostic done to get an accurate estimate.

7. What are some preventive maintenance tips to avoid getting OBDII code P1173 in my Volkswagen in the future?

Regularly cleaning the throttle body, inspecting and maintaining the throttle position sensor, and ensuring proper wiring connections can help prevent issues that may trigger this code.

8. Is OBDII code P1173 in a Volkswagen related to the Throttle Actuation Potentiometer Signal 2 a common issue?

While it may not be as common as some other codes, issues with the throttle position sensor and related components can occur in Volkswagen vehicles, leading to this specific fault code.

9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1173 in a Volkswagen at home?

Depending on the specific cause, a DIY enthusiast may be able to fix this issue at home by replacing the throttle position sensor, performing a throttle body cleaning, or checking and repairing wiring connections.

10. How urgent is it to address OBDII code P1173 in a Volkswagen indicating a high Throttle Actuation Potentiometer Signal 2?

It is recommended to address this code promptly to prevent further damage to the engine, ensure safe driving conditions, and avoid potential issues like stalling or loss of power while driving.

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