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P1520 Volkswagen Code - Intake Manifold Changeover Valve 2 Circuit Open

Quick Answer

The P1520 diagnostic trouble code for Volkswagen vehicles indicates a problem with the Intake Manifold Changeover Valve 2 Circuit being open. Common causes include Faulty Intake Manifold Changeover Valve 2, Wiring issues or damaged connectors in the circuit, Electrical problems such as a blown fuse or relay. 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
P1520 Volkswagen indicates Intake Manifold Changeover Valve 2 Circuit Open.
Common causes
Common causes include Faulty Intake Manifold Changeover Valve 2, Wiring issues or damaged connectors in the circuit, Electrical problems such as a blown fuse or relay.
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 P1520 Volkswagen Description

The P1520 diagnostic trouble code for Volkswagen vehicles indicates a problem with the Intake Manifold Changeover Valve 2 Circuit being open. The intake manifold changeover valve is responsible for controlling the flow of air into the intake manifold. In this case, the circuit being open means that there is an electrical issue preventing the valve from functioning properly. This can lead to a disruption in the air intake process, affecting the air-fuel mixture and ultimately the engine's performance.

OBDII Code P1520 Volkswagen - Intake Manifold Changeover Valve 2 Circuit Open
P1520 Volkswagen Code - Intake Manifold Changeover Valve 2 Circuit Open

Common Causes of P1520 Volkswagen

  1. Faulty Intake Manifold Changeover Valve 2
  2. Wiring issues or damaged connectors in the circuit
  3. Electrical problems such as a blown fuse or relay
  4. Corrosion or dirt affecting the valve operation
  5. ECM (Engine Control Module) malfunction

Symptoms of P1520 Volkswagen

  1. Decreased engine power
  2. Reduced fuel efficiency
  3. Rough idling or stalling
  4. Hesitation or misfires during acceleration
  5. Illuminated Check Engine Light

How to Fix P1520 Volkswagen

  1. Begin by performing a visual inspection of the intake manifold changeover valve and its circuit to check for any obvious signs of damage or disconnection.
  2. Use a multimeter to test the continuity of the circuit and verify that the valve is receiving power as intended.
  3. If the valve is faulty, replace it with a new one and ensure proper installation and connection.
  4. Check and repair any wiring issues or damaged connectors in the circuit.
  5. Clear the diagnostic trouble codes from the ECM and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P1520 Volkswagen

The cost of repairing the Intake Manifold Changeover Valve 2 Circuit Open issue can vary depending on the specific cause of the problem and the cost of parts and labor. On average, the parts for this repair may range from $100 to $300, while the labor cost can be between $100 and $200. Overall, the total repair cost could be around $200 to $500. It is advisable to consult with a trusted mechanic or auto repair shop to get a more accurate estimate based on your vehicle's make and model. Keep in mind that labor rates can vary, so it's essential to inquire about the rates in your area 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 P1520 Volkswagen Code

1. What are the common symptoms of OBDII code P1520 in a Volkswagen related to the Intake Manifold Changeover Valve 2 Circuit Open?

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

2. What can cause the Intake Manifold Changeover Valve 2 Circuit Open code (P1520) to trigger in a Volkswagen?

Possible causes include a faulty changeover valve, wiring issues, a blown fuse, or a problem with the valve control module.

3. How can I diagnose the Intake Manifold Changeover Valve 2 Circuit Open issue in my Volkswagen when the P1520 code appears?

Diagnosing this issue typically involves checking the wiring connections, testing the changeover valve for proper functionality, and inspecting the valve control module for any issues.

4. Can driving with the Intake Manifold Changeover Valve 2 Circuit Open code (P1520) cause further damage to my Volkswagen?

Continuing to drive with this issue may lead to reduced fuel efficiency, potential engine misfires, and could eventually cause damage to other engine components.

5. Is it safe to continue driving my Volkswagen if the P1520 code related to the Intake Manifold Changeover Valve 2 Circuit Open appears intermittently?

It is not recommended to drive the vehicle with intermittent P1520 codes, as it indicates an ongoing issue that can impact the performance and efficiency of the engine.

6. How much does it typically cost to repair the Intake Manifold Changeover Valve 2 Circuit Open problem in a Volkswagen?

The cost of repairing this issue can vary depending on the root cause, but it may range from $200 to $500 for parts and labor.

7. Are there any DIY repair tips for addressing the P1520 code related to the Intake Manifold Changeover Valve 2 Circuit Open in a Volkswagen?

DIY enthusiasts with automotive experience can attempt to inspect and replace the changeover valve, check and repair wiring connections, or replace blown fuses to address this issue.

8. Can a faulty Intake Manifold Changeover Valve 2 Circuit Open impact the emissions performance of my Volkswagen?

Yes, a malfunctioning changeover valve can affect the emissions system, potentially causing the vehicle to fail emissions tests and emit higher levels of pollutants.

9. Is the Intake Manifold Changeover Valve 2 Circuit Open issue a common problem in Volkswagen vehicles?

While not extremely common, the P1520 code related to the changeover valve circuit can occur in some Volkswagen models due to electrical or mechanical issues.

10. How long does it typically take to repair the Intake Manifold Changeover Valve 2 Circuit Open problem in a Volkswagen at a professional auto repair shop?

The repair process can usually be completed within a few hours, but it may take longer if additional diagnostics or parts replacement are required.

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