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P2063 Audi Code - Reductant/Regeneration Supply Control Circuit Low

Quick Answer

The P2063 diagnostic trouble code (DTC) for Audi vehicles specifically relates to the Reductant/Regeneration Supply Control Circuit being detected as low. Common causes include Faulty Reductant Control Module: A malfunctioning control module responsible for regulating the reductant supply can trigger the P2063 code, Wiring Issues: Corroded or damaged wiring in the Reductant/Regeneration Supply Control Circuit can cause a low voltage reading and trigger the code, Defective Reductant Pump: A failing or faulty reductant pump can lead to insufficient supply of reductant to the SCR system, triggering 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
P2063 Audi indicates Reductant/Regeneration Supply Control Circuit Low.
Common causes
Common causes include Faulty Reductant Control Module: A malfunctioning control module responsible for regulating the reductant supply can trigger the P2063 code, Wiring Issues: Corroded or damaged wiring in the Reductant/Regeneration Supply Control Circuit can cause a low voltage reading and trigger the code, Defective Reductant Pump: A failing or faulty reductant pump can lead to insufficient supply of reductant to the SCR system, triggering 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 P2063 Audi Description

The P2063 diagnostic trouble code (DTC) for Audi vehicles specifically relates to the Reductant/Regeneration Supply Control Circuit being detected as low. In modern diesel vehicles, Selective Catalytic Reduction (SCR) systems are used to reduce harmful emissions such as nitrogen oxides (NOx). The SCR system utilizes a reductant, typically a urea-based solution known as AdBlue, to help convert NOx into nitrogen and water vapor. The Reductant/Regeneration Supply Control Circuit is responsible for controlling the supply of this reductant to the SCR system for efficient operation.

OBDII Code P2063 Audi - Reductant/Regeneration Supply Control Circuit Low
P2063 Audi Code - Reductant/Regeneration Supply Control Circuit Low

Common Causes of P2063 Audi

  1. Faulty Reductant Control Module: A malfunctioning control module responsible for regulating the reductant supply can trigger the P2063 code.
  2. Wiring Issues: Corroded or damaged wiring in the Reductant/Regeneration Supply Control Circuit can cause a low voltage reading and trigger the code.
  3. Defective Reductant Pump: A failing or faulty reductant pump can lead to insufficient supply of reductant to the SCR system, triggering the code.
  4. Low AdBlue Fluid Level: If the AdBlue fluid level is low or depleted, the SCR system will not be able to function properly, leading to the P2063 code.

Symptoms of P2063 Audi

  1. Check Engine Light: The most common symptom associated with the P2063 code is the illumination of the Check Engine Light on the vehicle's dashboard.
  2. Reduced Fuel Efficiency: The vehicle may experience a decrease in fuel efficiency due to the inefficient operation of the SCR system.
  3. Power Loss: Drivers may notice a decrease in power output or acceleration, especially during acceleration.
  4. Engine Misfires: In severe cases, the engine may experience misfires or hesitation during operation.

How to Fix P2063 Audi

  1. Diagnose the Issue: Use a diagnostic scanner to read the code and pinpoint the exact cause of the P2063 code.
  2. Check Wiring and Connections: Inspect the wiring and connections in the Reductant/Regeneration Supply Control Circuit for any damage or corrosion and repair as needed.
  3. Test Reductant Pump: Test the functionality of the reductant pump to ensure it is supplying the correct amount of reductant to the SCR system.
  4. Refill AdBlue Fluid: If the AdBlue fluid level is low, refill the reservoir with the appropriate AdBlue solution to ensure proper functioning of the SCR system.

Cost to Fix P2063 Audi

The cost estimate for resolving the P2063 code can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the repair costs for addressing this code can range from $200 to $500, including parts and labor. However, it's important to note that the final cost can be higher if additional components need to be replaced or if there are underlying issues that require attention. As always, it's recommended to consult with a certified mechanic or dealership for an accurate diagnosis and repair 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.

Frequently Asked Questions about P2063 Audi Code

1. What does the OBDII code P2063 mean on an Audi?

P2063 indicates a "Reductant/Regeneration Supply Control Circuit Low," which refers to a problem in the electrical circuit controlling the diesel exhaust fluid (DEF) system used for emissions reduction.

2. What are the common symptoms of the P2063 code in an Audi?

Common symptoms include the check engine light turning on, poor fuel efficiency, reduced engine performance, or a message indicating an issue with the emissions system.

3. What causes the P2063 code on an Audi?

The code is typically caused by faulty reductant supply control components, wiring or connector issues, a failed reductant injector or pump, or a malfunctioning control module.

4. Can a bad reductant injector trigger the P2063 code?

Yes, a faulty reductant injector can cause the P2063 code if it disrupts the system's ability to properly manage DEF injection.

5. How do I diagnose the P2063 code on an Audi?

Diagnosis involves using a scan tool to check for related codes, visually inspecting wiring and connectors in the DEF system, and testing the reductant pump and injector for proper operation.

6. Is it safe to drive with the P2063 code on my Audi?

While the vehicle may still be drivable, ignoring the P2063 code can lead to increased emissions, reduced fuel efficiency, and potential damage to the emissions system.

7. How much does it cost to repair the P2063 code on an Audi?

Repair costs vary depending on the root cause but may range from $150 to $1,000, depending on whether the issue is with wiring, the reductant pump, or another component.

8. Can a software update fix the P2063 code on an Audi?

In some cases, a software update to the engine control module (ECM) may resolve the issue, but this depends on the specific circumstances and diagnostics.

9. What tools are needed to fix the P2063 code?

You’ll need an OBDII scan tool, a multimeter to check electrical circuits, and possibly specialty tools to access and test the DEF components.

10. How can I prevent the P2063 code from occurring again?

Regular maintenance of the DEF system, including using high-quality DEF fluid and checking for damaged wiring or connectors, can help prevent the P2063 code from recurring.

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