The standard P3 Cars Gauge uses your OBD port to collect boost pressure readings. If you’re using a piggyback tune such as the Burger Motorsports JB1 or you are you looking for more accurate boost readings, the optional Analog Boost Sensor gives you true manifold pressure instead of ECU MAP sensor readings.

Parts Required

Step 1

Remove the side panel where your P3 Cars Control Box is located. Plug in the Analog Boost Sensor and connect your vacuum hose. A cable tie can be used to secure the hose.

Step 2

Neatly secure the Analog Boost Sensor and begin to route the vacuum hose into the engine bay. See our tutorial here on how to run wires and hoses into the engine bay.

Step 3

There’s two options when it comes to accessing manifold pressure for the boost sensor.

  1. Connect the vacuum hose to a ‘Boost Tap’. These taps come in a variety of forms, from throttle body spacers, to MAP sensor adapters.
  2. If you already have a blow-off valve installed you can use this existing vacuum line. We used a T-Piece to tap our blow-off valve vacuum hose.

Step 4

If required use a universal reducer to adapt from the larger blow-off valve hose to the smaller boost sensor hose.

Step 5

Neatly route the vacuum hose around the engine as required, depending on your make and model. We chose to use the existing cable clips and a few cable ties. Ensure you only lightly fasten the cable ties and leave adequate slack to account for engine movement.

Step 6

Enter the P3 Gauge settings menu by holding both buttons. Scroll to the ‘Boost Reading Selection’ displayed as bSt.d or A or n – Digital or Analog or None. Set the setting to ‘A’ for Analog.

Once set to Analog and the gauge has rebooted, enter the ‘Analog Boost Sensor Calibration’ displayed as Cal.B. This calibrates the boost sensor to your current altitude. Enter the calibration, turn the engine off and then tap the left button. Calibrate your analog sensor any time your altitude changes significantly to ensure the highest accuracy.

Full instructions can be found here.


You’re done! Perform a test drive to ensure the gauge is reading pressure correctly. If the boost pressure appears inaccurate ensure the vacuum hose is not pinched, restricted or blocked.

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