P0047 Fault Code

Turbocharger/Supercharger Boost Control "A" Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0047 fault code is specifically related to the Turbocharger/Supercharger Boost Control Circuit. It indicates that there is a low voltage condition detected in the "A" circuit of the boost control system.

The boost control system is responsible for regulating the amount of pressure or boost delivered by the turbocharger or supercharger to the engine. When the P0047 code is triggered, it means that the voltage in the boost control circuit is below the specified threshold.

Possible causes for this fault code include a faulty boost pressure sensor, a problem with the boost control solenoid, a damaged or disconnected wiring harness, or a problem with the engine control module (ECM).

To diagnose and solve the issue, the following steps can be taken:

1. Inspect the wiring harness: Check for any damaged, disconnected, or corroded wires or connectors in the boost control circuit. Repair or replace as necessary.

2. Check the boost pressure sensor: Using a multimeter, test the boost pressure sensor for proper operation. If it is faulty, replace it.

3. Test the boost control solenoid: Check the boost control solenoid for proper operation by applying voltage and verifying that it opens and closes correctly. Replace if necessary.

4. Verify ECM functionality: If all other components are in working order, it may be necessary to check the functionality of the ECM using proper diagnostic tools. If it is determined to be faulty, it should be replaced or reprogrammed.

It is important to address the P0047 fault code promptly, as it can affect the engine's overall performance and fuel efficiency. It is recommended to consult with a qualified mechanic or automotive technician for a proper diagnosis and repair of the issue.

What are the symptoms of the P0047 code?

The P0047 fault code typically indicates an issue with the turbocharger/supercharger boost control "A" circuit being too low. Symptoms of this fault code may include the following:

• Check Engine Light (CEL) is illuminated.
• Reduced engine power or poor acceleration.
• Decreased fuel efficiency.
• Increased exhaust emissions.
• Turbocharger/supercharger not engaging or performing optimally.
• Engine may surge or hesitate during acceleration.

Please note that these symptoms may vary depending on the make and model of the vehicle. It is recommended to consult a professional mechanic or use a vehicle diagnostic tool to accurately diagnose and repair the issue.

What causes the P0047 code?

The P0047 fault code is related to the Turbocharger/Supercharger Boost Control "A" Circuit, specifically indicating a low output. This fault code can be triggered by a number of issues, including:

1. Faulty Boost Control Solenoid: The boost control solenoid is responsible for regulating the amount of pressure supplied to the turbocharger or supercharger. If the solenoid is faulty or has failed, it can cause a low boost pressure condition and trigger the P0047 code.

2. Clogged or Dirty Air Filter: A clogged or dirty air filter can restrict the flow of air to the turbocharger, resulting in reduced boost pressure and the P0047 code being triggered.

3. Intake Air Leak: Any air leak in the intake system, such as a cracked or damaged intake hose, can cause a loss of boost pressure and trigger the P0047 code.

4. Turbocharger/Supercharger Issues: Problems with the turbocharger or supercharger itself, such as a worn or damaged turbine wheel or compressor wheel, can lead to low boost pressure and the P0047 fault code.

5. Wiring or Connector Problems: Faulty wiring or connectors in the boost control circuit can cause a low boost pressure condition and trigger the P0047 code.

It is important to note that the specific cause of the P0047 fault code can vary depending on the make and model of the vehicle. Therefore, it is recommended to consult the vehicle's repair manual or seek assistance from a professional mechanic for an accurate diagnosis and repair.

How to fix P0047?

To fix the P0047 fault code on cars, follow these steps:

1. Inspect the turbocharger/supercharger boost control "A" circuit for any loose or damaged connections.
2. Check the wiring harness for any signs of damage or corrosion. Repair or replace any faulty wiring.
3. Inspect the boost control solenoid for proper operation. Clean or replace it if necessary.
4. Check for any leaks in the boost pressure system, including hoses, intercooler, and intake manifold. Repair or replace any damaged components.
5. Use a scan tool to clear the fault code from the engine control module (ECM) memory and reset the system.
6. Take the vehicle for a test drive to ensure the fault code does not reappear.

Note: If these steps do not resolve the issue, it is recommended to seek professional help or consult the vehicle's service manual for further diagnosis and repair.