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P2064 Volkswagen Code - Reductant/Regeneration Supply Control Circuit High

Quick Answer

The P2064 diagnostic trouble code (DTC) for Volkswagen vehicles specifically refers to an issue with the Reductant/Regeneration Supply Control Circuit being detected as high. Common causes include Faulty Control Module: A malfunction in the control module responsible for managing the SCR system can trigger this code, Wiring Issues: Damaged or corroded wiring harness connections can disrupt the communication between components, Sensor Malfunction: A faulty sensor within the SCR system can lead to inaccurate readings and trigger the 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
P2064 Volkswagen indicates Reductant/Regeneration Supply Control Circuit High.
Common causes
Common causes include Faulty Control Module: A malfunction in the control module responsible for managing the SCR system can trigger this code, Wiring Issues: Damaged or corroded wiring harness connections can disrupt the communication between components, Sensor Malfunction: A faulty sensor within the SCR system can lead to inaccurate readings and trigger the 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 09, 2024
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Code P2064 Volkswagen Description

The P2064 diagnostic trouble code (DTC) for Volkswagen vehicles specifically refers to an issue with the Reductant/Regeneration Supply Control Circuit being detected as high. In the context of diesel-powered vehicles, this code is related to the Selective Catalytic Reduction (SCR) system, which is responsible for reducing harmful emissions by injecting a urea-based solution (AdBlue) into the exhaust stream to convert nitrogen oxides into less harmful substances.

OBDII Code P2064 Volkswagen - Reductant/Regeneration Supply Control Circuit High
P2064 Volkswagen Code - Reductant/Regeneration Supply Control Circuit High

Common Causes of P2064 Volkswagen

  1. Faulty Control Module: A malfunction in the control module responsible for managing the SCR system can trigger this code.
  2. Wiring Issues: Damaged or corroded wiring harness connections can disrupt the communication between components.
  3. Sensor Malfunction: A faulty sensor within the SCR system can lead to inaccurate readings and trigger the code.
  4. SCR Injector Problem: Issues with the SCR injector, such as clogging or malfunction, can also cause this code to appear.

Symptoms of P2064 Volkswagen

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Reduced Fuel Efficiency: Drivers may notice a decrease in fuel efficiency due to the compromised operation of the SCR system.
  3. Loss of Power: The vehicle may experience a reduction in power output, especially during acceleration.
  4. Increased Emissions: The vehicle may produce higher emissions than usual, which can be detected during emissions testing.

How to Fix P2064 Volkswagen

  1. Diagnose the Issue: Use a diagnostic scanner to read the fault codes and pinpoint the exact cause of the problem.
  2. Inspect Wiring and Connections: Check the wiring harness and connections for any signs of damage, corrosion, or loose connections.
  3. Test Sensors: Verify the operation of the sensors within the SCR system to determine if any of them are faulty.
  4. Replace Faulty Components: Depending on the diagnosis, repair or replace the control module, wiring harness, sensors, or SCR injector as needed.
  5. Clear Codes and Test Drive: After completing the repair, clear the fault codes, and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P2064 Volkswagen

The cost of repairing the Reductant/Regeneration Supply Control Circuit High issue can vary depending on the specific cause of the problem and the labor rates at the auto repair shop. On average, the repair costs for this issue can range from $200 to $600, including parts and labor. However, it is essential to note that the actual cost can be higher or lower based on factors such as the location of the repair shop, the make and model of the vehicle, and the extent of the repairs needed. It is recommended to obtain a personalized cost estimate from a trusted auto repair shop to get a more accurate idea of the expenses involved.

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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 P2064 Volkswagen Code

1. What does the P2064 code mean for a Volkswagen?

The P2064 code indicates a "Reductant/Regeneration Supply Control Circuit High," meaning the system controlling diesel exhaust fluid (DEF) delivery to reduce emissions has an electrical issue.

2. What are the common symptoms of the P2064 code in a Volkswagen?

Symptoms may include the check engine light turning on, reduced engine performance, increased emissions, or a DEF system warning on the dashboard.

3. What causes the P2064 code in a Volkswagen?

Potential causes include a faulty reductant pump, damaged wiring or connectors in the DEF system, a malfunctioning control module, or electrical issues such as shorted circuits.

4. Can I drive my car with the P2064 code active?

While the car may drive with the code active, it may experience reduced performance or eventually enter a limp mode. Prolonged driving without repair can damage the emissions system.

5. How do I diagnose a P2064 code in my Volkswagen?

Diagnosing the code typically involves scanning with an OBDII tool, inspecting the DEF pump and wiring for damage, and checking for proper voltage in the reductant system circuit.

6. What repairs are needed to fix the P2064 code?

Repairs may include replacing the reductant pump, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the DEF system control module.

7. Is the P2064 code covered under warranty for Volkswagen vehicles?

Depending on your vehicle's age and mileage, the DEF system may be covered under the emissions warranty. Check with your Volkswagen dealer for details.

8. How much does it cost to fix the P2064 code on a Volkswagen?

Repair costs can range from $200 to $1,000, depending on whether the issue involves wiring repairs or replacement of the reductant pump or control module.

9. Can a low DEF level cause the P2064 code in a Volkswagen?

A low DEF level itself does not trigger P2064 but can cause related system warnings. Always ensure the DEF tank is adequately filled before further diagnosis.

10. How can I prevent the P2064 code from reoccurring?

Regular maintenance of the DEF system, including checking for leaks, inspecting wiring, and ensuring proper fluid levels, can help prevent this code from returning.

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