P0240 Fault Code

P0240 OBD-II Trouble Code Short Description

Turbocharger Boost Sensor B Range/Performance

What does trouble code P0240 mean?

The P0240 code indicates that there is a problem with the turbocharger boost sensor B on a vehicle. This code typically means that there is an issue with the sensor or wiring associated with it. It may also suggest that the boost pressure signal is out of range or is not providing accurate information to the engine control module (ECM).

The solution to this problem will depend on the root cause of the issue. If the sensor is faulty, it may need to be replaced. If the wiring or connectors associated with the sensor are damaged or loose, they will need to be repaired or replaced. In some cases, the problem may be related to the turbocharger itself, so a full system diagnosis will be necessary.

It's essential to address this issue promptly because it may cause poor engine performance, reduced fuel efficiency, and potentially other problems if left unresolved. Therefore, it's recommended to take your vehicle to a qualified mechanic to diagnose and repair the issue and prevent any further damages to the vehicle.


What are the symptoms of the P0240 code?

Symptoms of P0240 fault code on cars can include:

  • Lack of power or acceleration
  • Engine stalling
  • Rough idling or poor engine performance
  • Check engine light illuminated
  • Reduced fuel efficiency
  • Reduced turbocharger boost pressure


What causes the P0240 code?

P0240 is a fault code that indicates an issue with the Turbocharger Boost Sensor B in a vehicle. Here are some common causes of this fault code:

  1. Faulty turbocharger boost sensor
  2. Wiring or connector issues in the boost sensor circuit
  3. Vacuum leaks in the intake system
  4. Malfunctioning wastegate or boost control solenoid
  5. Clogged or restricted air intake and/or exhaust systems

It is recommended to have the vehicle diagnosed by a professional mechanic to determine the specific cause and necessary repairs.

Possible Solutions

How to fix P0240?

To fix the P0240 fault code on cars, the following steps can be taken:

  1. Check the Turbocharger Boost Sensor B: The first step is to inspect the turbocharger boost sensor B and its wiring connections. Ensure that there is no damage or corrosion to the sensor or its wiring.

  2. Check for vacuum leaks: Vacuum leaks can cause the turbocharger to work harder, resulting in an increase in boost pressure. Check all the vacuum lines, hoses, and intake manifold gaskets for leaks.

  3. Check the Fuel Pressure: Sometimes low fuel pressure can cause the turbocharger to work harder and create additional boost pressure. Check the fuel pressure and replace the fuel filter if necessary.

  4. Clean the Mass Airflow Sensor: Any debris or dirt on the mass airflow sensor can cause the engine to receive incorrect readings. Clean the mass airflow sensor with an appropriate cleaner.

  5. Check the Turbocharger Actuator: If the boost pressure is still high, check the turbocharger actuator to determine whether it's receiving signals from the engine control module. If it's not receiving signals, it may need to be replaced.

After performing these steps, clear the fault code using a diagnostic tool and test drive the vehicle to ensure that the problem has been fixed.


  • What does the P0240 error code mean?

    The P0240 code means that there is an issue with the turbocharger boost sensor B range or performance.

  • What are the symptoms of a P0240 error code?

    Symptoms of a P0240 code may include decreased power or acceleration, engine misfire, or a decrease in fuel efficiency.

  • What causes a P0240 error code?

    A P0240 code can be caused by a faulty turbocharger boost sensor, a damaged sensor harness or connector, or a damaged turbocharger.

  • How is a P0240 error code diagnosed?

    A P0240 code can be diagnosed using a scan tool that can read the error code. The technician may also visually inspect the sensor and wires for damage.

  • How is a P0240 error code repaired?

    Depending on the cause, a P0240 code can be repaired by replacing the turbocharger boost sensor, repairing or replacing the sensor harness or connector, or replacing the turbocharger itself.

  • Can a P0240 error code be ignored?

    A P0240 code should not be ignored, as it can lead to decreased engine performance and efficiency. It's best to have it diagnosed and repaired as soon as possible.

  • How much does it cost to fix a P0240 error code?

    The cost to fix a P0240 code will depend on the specific cause and the labor rates in the area. It could range from a few hundred dollars to over a thousand dollars.

  • Can I drive with a P0240 error code?

    While it is possible to drive with a P0240 code, it's not recommended as it can lead to more serious engine problems down the line. It's best to have it diagnosed and repaired as soon as possible.