Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Boost Pressure Sensor (After Supercharger)
The boost pressure sensor measures the air pressure in the intake, after the compressor ahead of the turbo. The information is used to regulate compressor and turbo control, as well as to control other air pressure sensors in certain positions.
The sensor, which is an Piezo resistive resistor, is grounded in the control module and supplied with power (5 V) from the control module.
Depending on the pressure, the silicone membrane in the sensor moves which changes the resistance, and thus varies the voltage level of the analogue signal to the control module.
For information about electrical connection, see wiring diagram. For sensor characteristics and normal values, see signal specification and component specification.
The pressure sensor can be diagnosed by the Engine Control Module (ECM) and the sensor signal can be read off.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.