P0047 - TURBOCHARGER / SUPERCHARGER BOOST CONTROL “A” CIRCUIT LOW

The P0047 OBDII fault code is set when the Powertrain Control Module (PCM) is not receiving any signal from the boost control solenoid, or the Boost Pressure Sensor (BPS) may not meet the manufacturer’s specifications.

The boost pressure should be between 6 to 14 psi. The letter “A” in this code represents the circuit where the problem lies.

• Illuminated check engine lamp.
• Loss of engine power.
• Fuel mileage is significantly reduced.
• Excessive amount of black smoke comes out of the exhaust.

Reasons for setting the DTC P0047 OBD2 code:

• There could be vacuum leaks.
• The air filter may be dirty.
• The BPS could be faulty.
• The control solenoid may have damage.
• The electrical system could have bad wiring.

To troubleshoot problems caused by the P0047 OBDII error code, consider this:

• Consult the TSB (Technical Service Bulletins).
• Check the turbocharger and its control system. Look for loose connections, damaged wires, or vacuum leaks.
• Test the solenoid for power and ground. To do this, you should use a scan tool. If you observe a lack of power, check the wires related to the solenoid to find the reason for the problem.
• Check the turbocharger for contaminants or damage. Replace it if necessary.
• Check the Boost Pressure Sensor (BPS) and its associated circuitry. Verify that power, ground, and signal are present. If not, make the necessary repairs.