P005E Fault Code

P005E OBD-II Trouble Code Short Description

Turbocharger/Supercharger Boost Control B Supply Voltage Circuit Low

What does trouble code P005E mean?

The P005E fault code in cars refers to the Turbocharger/Supercharger Boost Control B Supply Voltage Circuit Low. This code indicates that there is a problem with the voltage supply circuit for the boost control of the turbocharger or supercharger.

The turbocharger or supercharger plays a crucial role in increasing the engine's air intake, which leads to improved power and performance. The boost control system ensures that the turbocharger or supercharger is operating at the correct pressure to provide optimal performance.

When the P005E code is triggered, it means that the voltage in the supply circuit for the boost control system is below the expected level. This may be caused by a variety of issues, including a faulty sensor, damaged wiring, or a problem with the control module.

To diagnose and fix the P005E code, the following steps may be taken:

  1. Inspecting the wiring and connectors: A visual inspection will be conducted to check for any damaged or loose wires or connectors that may be causing the low voltage issue. If any issues are found, repairs or replacements will be made.

  2. Testing the boost control sensor: The boost control sensor will be tested using a multimeter or other diagnostic tools to ensure it is functioning correctly. If the sensor is faulty, it will be replaced.

  3. Checking the control module: The control module responsible for regulating the turbocharger or supercharger may be tested to ensure it is receiving the proper voltage and sending the correct signals. If the control module is found to be defective, it will be replaced.

  4. Clearing the fault code: After the repairs have been made, the fault code will be cleared from the car's onboard computer system using a diagnostic tool. This will reset the system and allow for monitoring to ensure the issue does not reoccur.

It is important to address the P005E code promptly, as a malfunctioning turbocharger or supercharger can lead to decreased engine performance and potential damage if not properly rectified. Consulting with a qualified mechanic or utilizing diagnostic tools is recommended to accurately diagnose and repair the issue.


What are the symptoms of the P005E code?

Symptoms of a P005E fault code on cars may include:

  • Check Engine Light (CEL) is illuminated
  • Decreased engine power or performance
  • Loss of turbocharger or supercharger boost
  • Decreased fuel efficiency
  • Engine hesitation or stumbling
  • Rough idling or stalling
  • Possible misfires or exhaust smoke
  • Difficulty starting the engine

It is important to note that these symptoms can vary depending on the make and model of the vehicle. Consulting with a professional mechanic or using a diagnostic tool is recommended to determine the exact cause and address the issue.


What causes the P005E code?

The P005E fault code is related to the Turbocharger/Supercharger Boost Control B Supply Voltage Circuit being too low. This can be caused by a variety of factors, including:

  1. Faulty Turbocharger/Supercharger Boost Control B Sensor: The sensor responsible for measuring the voltage in the circuit may be malfunctioning or not providing accurate readings.

  2. Electrical Wiring Issues: There may be a problem with the wiring connecting the sensor to the vehicle's main electrical system. This can include issues such as a short circuit, open circuit, or damaged wires.

  3. Poor Electrical Connection: The sensor may not be properly connected to the electrical circuit, resulting in a low voltage reading. This can be caused by loose or corroded terminals.

  4. Faulty Powertrain Control Module (PCM): The PCM, which controls various engine functions, including the turbocharger/supercharger boost control, may be defective and not providing the correct voltage to the circuit.

  5. Other Electrical Malfunctions: Other electrical components or systems within the vehicle may be malfunctioning, causing a voltage drop in the turbocharger/supercharger boost control circuit.

It is important to note that the exact cause of the P005E fault code may vary depending on the make and model of the vehicle. To diagnose and resolve the issue, it is recommended to consult with a qualified mechanic or use a diagnostic tool to pinpoint the specific cause of the fault code.

Possible Solutions

How to fix P005E?

The P005E fault code indicates that there is a low voltage issue in the supply circuit of the turbocharger/supercharger boost control B. This code is commonly found in vehicles with forced induction systems such as turbochargers or superchargers. Below are some steps you can take to fix this fault code:

  1. Check the wiring and connectors: Start by inspecting the wiring and connectors related to the boost control B circuit. Look for any signs of damage, loose or corroded connections, and ensure that all connections are securely plugged in. Repair or replace any damaged components as necessary.

  2. Inspect the boost control solenoid: The boost control solenoid is responsible for regulating the boost pressure in the turbocharger/supercharger system. Inspect the solenoid for any signs of damage or obstruction. Clean or replace the solenoid if necessary.

  3. Test the voltage: Use a multimeter to measure the voltage at the boost control B circuit. Compare the readings to the manufacturer's specifications. If the voltage is significantly lower than the recommended range, there may be an issue with the power supply to the circuit. Inspect the fuse, relay, and wiring associated with the circuit for any faults.

  4. Inspect the boost sensor: The boost sensor measures the pressure in the intake manifold or air intake system. Ensure that the sensor is properly connected and functioning correctly. If there are any signs of damage or malfunction, replace the sensor.

  5. Reset the fault code: After performing the necessary repairs or replacements, reset the fault code using an OBD-II scanner or diagnostic tool. Clearing the code will allow you to determine whether the issue has been resolved.

If you are not confident in performing these steps on your own, it is recommended to seek assistance from a qualified mechanic or automotive technician. They will have the necessary tools and expertise to diagnose and repair the P005E fault code effectively.