P3 Gauge – Audi A4/S4/RS4/A5/S5/RS5 B8

P3 – OBD2 Vent Multi-Gauge V3 – Audi A4 / S4 / RS4 / A5 / S5 / RS5 B8

Custom built multi-function digital boost gauge and more for the B8 generation (2008-2016) Audi A4, S4, RS4, A5, S5, and RS5, including 1.8 TFSI, 2.0 TFSI, 3.2 FSI, S4 3.0 TFSI, RS4 4.2 FSI, 2.0 TDI, 2.7 TDI, 3.0 TDI, S5 3.0 TFSI, S5 4.2 FSI, and RS5 4.2 FSI quattro model.

Form and Function

Every P3 Gauge is built just for your car. It fits perfectly—like it was born there.

Stealthy. Stylish. Smart.

In one sleek display, you get real-time access to everything that matters: boost pressure, engine temperatures, performance timers, diagnostic reading/clearing, and more. All from the included diagnostics port connection or optional add-on sensors.

It’s easy to install, simple to use, and made to last.

Every unit is built to order, hand-assembled, and developed entirely in-house—not by a huge corporation, but by a small team who loves cars as much as you do.

Gauge Modes / Readings

We designed the P3 Gauge to read the most important data from your specific vehicle for easy plug-and-play installation. With a single OBD port connection, you’ll be up and running in minutes. If you wish to add additional sensors, or not use OBD at all, advanced tuners can use analog inputs or even run in analog-only mode.

OBD Port Data (CANbus Input)

• Boost Pressure
• Coolant Temperature
• Air/Fuel Ratio (AFR or Lambda)
• Vehicle Speed (Calibrated or Raw)
• Intake Air Temperature (IAT)
• Throttle Angle
• Ignition Timing
• Engine RPM (with programmable shift light)
• Exhaust Gas Temperature (EGT)
• Battery Voltage
• Acceleration Timers (0–60, 0–100, 60–130)
• Braking Timers (60–0, 100–0)
• Read & Clear Diagnostic Trouble Codes (DTCs)

Optional Analog Inputs

Optional but powerful. The P3 Gauge allows you to use up to three additional analog sensors, plus a dedicated input for automatic display dimming.

Analog Boost Input
• Supports the optional P3 Analog Boost Sensor
• Reads up to 80 PSI
• Ideal for high-boost or aftermarket forced-induction setups

2 × Universal 0–5V Inputs
• Two individual, configurable analog inputs
• Compatible with a wide range of aftermarket sensors
• Near-infinite possibilities for tuning and customization

Dimmer Voltage Detection Input
• Configure the gauge to d.On.A mode
• Any signal over 1V triggers display dimming
• Perfect for tapping into factory interior lighting

Vehicle Fitment – P3 OBD2 Vent Multi-Gauge V3 (B8 Platform)

Your P3 Gauge – Guides and Videos
Audi A4 / S4 / RS4 / A5 / S5 / RS5 B8

• Setup & Operation PDF Guide
• Vent Install PDF Guide

Important Notes

• Some vehicles require positioning the control box below the vent and behind the dash trim due to limited space
• Many TDI tunes require the P3 Analog Boost Sensor for full and accurate boost readings

Configuration & Setup

• Configuration Guide
• Car Config Setting: cc.X
  – cc.A

Boost Readings (bSt.X)
• bSt.c – 3.0T
• bSt.1 – 2.0T