Boost Pressure Sensor : Location, Symptoms & Replacement Cost

boost pressure sensor

A boost pressure sensor is a key component in turbocharged engines in modern vehicles, which provides a better boost to engine performance. Actually, many types of sensors are installed in the engines of vehicles.

These different sensors monitor the performance of various parts of the engine and transmit data related to the performance of these parts to the engine control module of the vehicle. In this post, we will discuss the boost pressure sensor in detail.

What Is A Boost Pressure Sensor?

The boost pressure sensor sends a signal to the ECM by measuring the absolute pressure of the compressed air entering the inlet pipe or throttle between the turbocharger or supercharger and the engine.

In turbocharged engines, the turbocharger uses the exhaust gases to drive a turbine, which in turn compresses the intake air before entering the engine, resulting in improved engine performance. The boost pressure sensor monitors this compressed air pressure and provides real time data to the Engine Control Unit.

How Does Boost Pressure Sensor Work?

The boost pressure sensor is located on the inlet manifold of the engine or in the intercooler. The function of the boost pressure sensor is to measure the pressure and temperature of the air drawn by the turbocharger from the engine inlet manifold and transmit a signal to the ECM.

Thereby, the ECM sends the correct ratio of air and fuel to the fuel injectors for the fuel mixture required by the vehicle’s engine and controls the power pulse of the fuel injectors. Due to this, the engine provides ample power with the right amount of fuel consumption.

Boost Pressure Sensor Location

In modern vehicles, the boost pressure sensor is often located on the air intake manifold of the engine. But in some vehicles, the boost pressure sensor is located on the air intercooler.

Types Of Boost Pressure Sensor

Generally, there are two types of boost pressure sensors.

  • 3 Wire/Pin Boost Pressure Sensor
  • 4 Wire/Pin Boost Pressure Sensor

Symptoms Of A Bad Boost Pressure Sensor

  • Check engine light illuminated
  • Engine vibration and jerks
  • Engine misfire
  • Black smoke from the exhaust pipe
  • RPM needle not going above 2500 or 3000, even with full accelerator pedal depression
  • Engine low power performance
  • Reduced engine pick up during acceleration
  • Engine misfiring during acceleration
  • Scanner receiving trouble code P0105, P0106, P0107, P0108, P0109.

Causes of A Bad Boost Pressure Sensor

  • Damaged boost pressure sensor
  • Damaged or broken boost pressure sensor wiring
  • Engine control module error
  • Air intake manifold leak
  • Intercooler or hose pipe leaking

Boost Pressure Sensor Trouble Codes Meaning

When the boost pressure sensor is bad or failing, the OBD digital scanner may display different trouble codes.

  • P0105 – Manifold Absolute Pressure/Barometric Pressure Circuit
  • P0106 – Manifold Absolute Pressure/Barometric Pressure Circuit Range Performance
  • P0107 – Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
  • P0108 – Manifold Absolute Pressure/Barometric Pressure Circuit High
  • P0109 – Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent

Boost Pressure Sensor Replacement Cost

The replacement cost for a boost pressure sensor can range from $180 to $210, including mechanic labor costs. However, the location and rate of the mechanic can affect this cost.

Expect a boost pressure sensor to cost an average of $100 to $120, and you can expect to pay an average of $80 to $90 for the labor costs of a mechanic replacing it. However, the replacement cost of the engine boost pressure sensor in vehicles depends on the make and model of the vehicle and the cost of the mechanic.

Why Should Boost Pressure Sensor Failure Not Be Ignored?

It is important to immediately address a failed boost pressure sensor or any other problems, as they directly affect the performance and efficiency of a turbocharged engine. A bad sensor can cause reduced power, poor fuel efficiency, and possible engine damage due to an incorrect air-fuel mixture and boost level. Ignoring these boost sensor issues can result in increased fuel consumption and poor engine performance.

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