P2064 Code - Reductant/Regeneration Supply Control Circuit High
Quick Answer
The P2064 diagnostic trouble code (DTC) indicates a problem with the reductant or regeneration supply control circuit being too high. Common causes include Faulty Reductant Pump: A malfunctioning reductant pump can cause issues with the supply of the urea solution, triggering this code, Wiring Issues: Any damage or corrosion in the wiring connecting the reductant control circuit can lead to high voltage readings, Defective Sensors: Faulty sensors that monitor the reductant system's operation can also trigger this 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 indicates Reductant/Regeneration Supply Control Circuit High.
- Common causes
- Common causes include Faulty Reductant Pump: A malfunctioning reductant pump can cause issues with the supply of the urea solution, triggering this code, Wiring Issues: Any damage or corrosion in the wiring connecting the reductant control circuit can lead to high voltage readings, Defective Sensors: Faulty sensors that monitor the reductant system's operation can also trigger this 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P2064 Description
The P2064 diagnostic trouble code (DTC) indicates a problem with the reductant or regeneration supply control circuit being too high. This code is commonly associated with diesel vehicles that have a selective catalytic reduction (SCR) system to reduce harmful emissions. The reductant system injects a urea-based solution into the exhaust stream to break down nitrogen oxides into harmless nitrogen and oxygen.
Common Causes of P2064
- Faulty Reductant Pump: A malfunctioning reductant pump can cause issues with the supply of the urea solution, triggering this code.
- Wiring Issues: Any damage or corrosion in the wiring connecting the reductant control circuit can lead to high voltage readings.
- Defective Sensors: Faulty sensors that monitor the reductant system's operation can also trigger this code.
- Software Glitch: Sometimes, a software glitch or calibration issue in the vehicle's engine control module (ECM) can cause false readings in the reductant system.
Symptoms of P2064
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
- Reduced Fuel Efficiency: A malfunctioning reductant control circuit can lead to decreased fuel efficiency as the system may not be operating optimally.
- Poor Performance: The vehicle may experience reduced performance or acceleration due to the emissions control system not functioning correctly.
- Failed Emissions Test: If the reductant system is not working as intended, the vehicle may fail emissions testing.
How to Fix P2064
- Diagnose the Issue: Use a scan tool to read the DTC and pinpoint the exact cause of the problem.
- Check Wiring and Connectors: Inspect the wiring and connectors for any damage or corrosion. Repair or replace as needed.
- Test Sensors: Test the sensors associated with the reductant system to ensure they are functioning correctly.
- Replace Reductant Pump: If the reductant pump is found to be faulty, it will need to be replaced to resolve the issue.
- Clear Codes: After completing the repairs, clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P2064
The cost of repairing a P2064 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $200 to $500 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can vary, so it's best to get a detailed estimate from a trusted mechanic before proceeding with the repairs.
Need more information about the P2064 code?
Need more information on how to fix the P2064 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2064 code diagnosed by a professional: Find a repair shop in your area
Code P2064 Information for Specific Makes
- P2064 Audi — Reductant/Regeneration Supply Control Circuit High
- P2064 BMW — Reductant/Regeneration Supply Control Circuit High
- P2064 Dodge — Reductant/Regeneration Supply Control Circuit High
- P2064 Volkswagen — Reductant/Regeneration Supply Control Circuit High
Frequently Asked Questions about P2064 Code
What does the OBDII code P2064 mean?
P2064 indicates a problem with the reductant or regeneration supply control circuit, specifically that it is experiencing a high voltage condition.
What are the common symptoms of code P2064?
Symptoms may include the check engine light illuminating, reduced fuel efficiency, poor engine performance, or issues with the vehicle’s emissions system.
What causes the P2064 code to appear?
Possible causes include a faulty reductant pump, damaged wiring or connectors in the control circuit, a malfunctioning reductant control module, or a blown fuse.
Can I drive with a P2064 code?
Driving with this code is not recommended as it may lead to increased emissions and potentially damage other components in the emissions system.
How is the P2064 code diagnosed?
A mechanic will use an OBDII scanner to confirm the code, inspect the wiring and connectors, test the reductant pump and control module, and measure the circuit voltage.
How do you fix the P2064 code?
Repairs may involve replacing a faulty reductant pump, repairing or replacing damaged wiring, replacing the control module, or resetting the system after repairs.
What tools are needed to diagnose and repair the P2064 code?
Tools may include an OBDII scanner, multimeter, wiring diagrams, and basic hand tools for inspecting and repairing components.
How much does it cost to repair a P2064 code?
The cost depends on the exact issue, but replacing a reductant pump can range from $300 to $1,000, while fixing wiring issues may be less expensive.
Can a software update fix the P2064 code?
In some cases, a software update for the engine or emissions control module may resolve the issue, but this depends on the manufacturer’s recommendations.
Is the P2064 code specific to diesel vehicles?
Yes, this code is typically associated with diesel vehicles equipped with a Selective Catalytic Reduction (SCR) system that uses reductant fluid to reduce emissions.
Discuss the causes and fixes for P2064 OBDII Code
Code P2064 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.