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P1506 Volkswagen Code - Closed Throttle Position Switch Does Not Open./Short To Ground

Quick Answer

The P1506 diagnostic trouble code (DTC) specifically pertains to Volkswagen vehicles and indicates that the Closed Throttle Position Switch does not open or there is a short to ground. Common causes include Faulty Closed Throttle Position Switch: The switch itself may be defective or worn out, causing it not to open properly, Wiring issues: There could be a short to ground in the wiring harness connected to the switch, disrupting the signal to the ECM, ECM malfunction: The engine control module may be failing to interpret the signals from the switch correctly, leading to the P1506 code. 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
P1506 Volkswagen indicates Closed Throttle Position Switch Does Not Open./Short To Ground.
Common causes
Common causes include Faulty Closed Throttle Position Switch: The switch itself may be defective or worn out, causing it not to open properly, Wiring issues: There could be a short to ground in the wiring harness connected to the switch, disrupting the signal to the ECM, ECM malfunction: The engine control module may be failing to interpret the signals from the switch correctly, leading to the P1506 code.
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 P1506 Volkswagen Description

The P1506 diagnostic trouble code (DTC) specifically pertains to Volkswagen vehicles and indicates that the Closed Throttle Position Switch does not open or there is a short to ground. This switch is a crucial component of the throttle system, responsible for signaling the engine control module (ECM) about the position of the throttle. When the switch fails to open or there is a short to ground, it can lead to a variety of issues that can affect the vehicle's performance.

OBDII Code P1506 Volkswagen - Closed Throttle Position Switch Does Not Open./Short To Ground
P1506 Volkswagen Code - Closed Throttle Position Switch Does Not Open./Short To Ground

Common Causes of P1506 Volkswagen

  1. Faulty Closed Throttle Position Switch: The switch itself may be defective or worn out, causing it not to open properly.
  2. Wiring issues: There could be a short to ground in the wiring harness connected to the switch, disrupting the signal to the ECM.
  3. ECM malfunction: The engine control module may be failing to interpret the signals from the switch correctly, leading to the P1506 code.
  4. Vacuum leak: A vacuum leak in the intake system can also affect the Closed Throttle Position Switch's operation.

Symptoms of P1506 Volkswagen

  1. Rough idling: The vehicle may experience rough idling when the Closed Throttle Position Switch does not open correctly.
  2. Stalling: The engine may stall intermittently, especially when coming to a stop or at low speeds.
  3. Hesitation during acceleration: The vehicle may hesitate or jerk during acceleration, affecting overall driving experience.
  4. Decreased fuel efficiency: The vehicle may consume more fuel than usual due to improper fuel delivery.

How to Fix P1506 Volkswagen

  1. Diagnostic scan: Use a diagnostic scanner to retrieve the P1506 code and verify the issue.
  2. Inspect the Closed Throttle Position Switch: Check the switch for any visible damage or wear and replace if necessary.
  3. Check wiring and connections: Inspect the wiring harness connected to the switch for any signs of damage or shorts. Repair or replace as needed.
  4. Test ECM: Ensure the engine control module is functioning correctly and interpreting signals from the switch accurately. Replace if found faulty.
  5. Clear code and test drive: After completing repairs, clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1506 Volkswagen

The typical repair costs for addressing a P1506 code related to the Closed Throttle Position Switch can vary depending on the specific vehicle make and model, as well as the extent of the issue. On average, the parts cost for a new Closed Throttle Position Switch can range from $50 to $150, while the labor cost for diagnosis and repair can range from $100 to $300, taking approximately 1-2 hours to complete. It's important to consider that labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple sources to get a more accurate estimate.

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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.

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