P2064 BMW Code - Reductant/Regeneration Supply Control Circuit High
Quick Answer
The P2064 diagnostic trouble code (DTC) for BMW vehicles refers to the Reductant/Regeneration Supply Control Circuit High. Common causes include Faulty Reductant Control Module: The control module responsible for regulating the reductant system may be malfunctioning, causing the high voltage reading, Defective Sensor: A faulty sensor within the reductant system can send incorrect signals to the control module, triggering the P2064 code, Wiring Issues: Corrosion, damage, or loose connections in the wiring harnesses related to the reductant system can lead to high voltage readings. 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 BMW indicates Reductant/Regeneration Supply Control Circuit High.
- Common causes
- Common causes include Faulty Reductant Control Module: The control module responsible for regulating the reductant system may be malfunctioning, causing the high voltage reading, Defective Sensor: A faulty sensor within the reductant system can send incorrect signals to the control module, triggering the P2064 code, Wiring Issues: Corrosion, damage, or loose connections in the wiring harnesses related to the reductant system can lead to high voltage readings.
- 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.
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Code P2064 BMW Description
The P2064 diagnostic trouble code (DTC) for BMW vehicles refers to the Reductant/Regeneration Supply Control Circuit High. This code indicates a potential issue with the reductant (commonly known as diesel exhaust fluid or DEF) system in the vehicle. The reductant system is responsible for reducing harmful emissions from the vehicle's exhaust by injecting DEF into the exhaust stream, where it reacts with harmful pollutants to convert them into less harmful substances.
Common Causes of P2064 BMW
- Faulty Reductant Control Module: The control module responsible for regulating the reductant system may be malfunctioning, causing the high voltage reading.
- Defective Sensor: A faulty sensor within the reductant system can send incorrect signals to the control module, triggering the P2064 code.
- Wiring Issues: Corrosion, damage, or loose connections in the wiring harnesses related to the reductant system can lead to high voltage readings.
- Software Glitch: An issue with the software programming of the reductant control module can also trigger this code.
Symptoms of P2064 BMW
- 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 Engine Power: The vehicle may experience a decrease in engine power, leading to sluggish acceleration and overall performance.
- Increased Emissions: The vehicle may emit higher levels of pollutants due to the reductant system not functioning properly.
- Poor Fuel Economy: A malfunctioning reductant system can also result in decreased fuel efficiency, leading to more frequent refills at the pump.
How to Fix P2064 BMW
- Diagnose the Issue: Use a diagnostic scanner to retrieve the specific DTC and pinpoint the exact cause of the high voltage reading in the reductant system.
- Inspect Wiring and Connectors: Check all wiring harnesses and connectors related to the reductant system for any signs of damage, corrosion, or poor connections.
- Test Sensors: Test the sensors within the reductant system to ensure they are functioning correctly and providing accurate readings.
- Replace Reductant Control Module: If the control module is found to be faulty, it may need to be replaced to resolve the issue.
- Clear DTC and Test Drive: After completing the repairs, clear the DTC from the vehicle's computer and take it for a test drive to ensure the issue has been resolved.
Cost to Fix P2064 BMW
The cost of repairing a P2064 code for a BMW vehicle can vary depending on the specific cause of the issue. On average, you can expect to pay between $200 to $500 for parts and labor. Keep in mind that labor rates at auto repair shops can range from $80 to $150 per hour, so the total cost may be higher based on the shop's rates and the time required for diagnosis and repair. It's recommended to consult with a certified mechanic or dealership for a more accurate estimate based on your vehicle's make and model.
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Frequently Asked Questions about P2064 BMW Code
1. What does the OBDII code P2064 mean on a BMW?
The P2064 code indicates a high voltage issue in the Reductant/Regeneration Supply Control Circuit, which is part of the exhaust aftertreatment system for reducing emissions.
2. What are the common symptoms of code P2064 in a BMW?
Symptoms may include the Check Engine Light turning on, reduced fuel efficiency, poor engine performance, and possible emission test failures.
3. What causes the P2064 code to appear on a BMW?
Common causes include a faulty reductant pump, damaged wiring or connectors in the reductant control circuit, or a malfunctioning reductant level sensor.
4. Is it safe to drive a BMW with the P2064 code?
While the car may still be drivable, ignoring this code could lead to increased emissions, reduced performance, and potential damage to the exhaust aftertreatment system.
5. How is the P2064 code diagnosed on a BMW?
A mechanic will use a diagnostic scanner to confirm the code, inspect the reductant control circuit, check wiring and connectors for damage, and test the reductant pump or sensor for faults.
6. What repairs can fix the P2064 code on a BMW?
Repairs may include replacing the reductant pump, repairing or replacing damaged wiring, cleaning or replacing the reductant level sensor, or updating the vehicle’s ECU software if needed.
7. Can a dirty reductant tank cause the P2064 code on a BMW?
Yes, contamination or a clogged reductant tank can cause issues with the reductant pump or sensor, potentially triggering this code.
8. Will clearing the P2064 code solve the problem permanently?
Clearing the code may temporarily turn off the Check Engine Light, but the underlying issue must be fixed to prevent the code from returning.
9. How much does it cost to fix the P2064 code on a BMW?
Repair costs can vary widely, ranging from $150 to $1,000 or more, depending on whether the issue is with wiring, sensors, or the reductant pump.
10. Can a software update resolve the P2064 code on a BMW?
In some cases, a software update from the dealership can address issues related to the reductant control system, but it depends on the specific vehicle and situation.
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