P3 Gauges

English/Metric:
En.Y Y, N, b, or c English units. Y = English, N = Metric, b = Boost only (boost in PSI, all other data in metric), c = temp in Celsius, all other data in English

Boost Pressure Resolution:
Pr0.1 0.1 or 0.5 or 1.0 decimal point. 0.1 = tenths, 0.5 is rounded to 5 tenths, 1.0 = whole numbers

Vacuum Bargraph:
U.bg.Y Y or N Vacuum bargraph in boost mode – set to N for no bargraph while in vacuum

Shift Light – Gauge display will FLASH when above this RPM:
SL.57 . 30 – 99 Shift light activation RPM x 100, default is 5700

Boost Reading Selection:
bSt.d or A or n, digital or analog or none. (analog is for gauges with boost sender and tubing to manifold) Digital is used for n55/n20 only. The A setting will use the blue wire MAP tap for certain CAR selections. See the vehicle specific settings page.

Analog Input Config (see the analog inputs section for details):
A1.N Y or N Enable or disable the first analog input (brown wire)
A2.N Y or N Enable or disable the second analog input (blue wire)

Code Clearing:
Clr.C Hold the first button to clear codes. See Code Reading and Clearing section above for details.

Code Reading (K-Line vehicles only):
rd.C.n , n = no code read, Y = read at startup

Analog Boost Sensor Calibration (required after install of sensor!):
Cal.b , Calibrate the analog boost sensor to your barometer. — tap left button after confirming the engine is off. Calibrate your analog sensor any time that your altitude changes significantly to ensure the highest accuracy.

Car Selection (not available on all models):
Car.0 through Car.8 and ANLG (analog) mode. See the CHART above for more details.
NOTE: For BMW models, car selections 5 through 8 cause the bSt.A mode to expect MAP sensor 0-5v input on the blue wire. If you have a bSt.P option, this does that instead of Car selection. The default setting for this value will change depending on the gauge model that was shipped. Use Car.0-5 bSt.A for analog boost sensor for this reason.

Sh.X (Y, n, A, P):
Vehicle specific software protocol adjustments (See configuration list for details, use Sh.A unless otherwise directed)

5v POWER SOURCE:
If your sensor requires a 5v power source, you can use the PURPLE wire on the gauge harness.

To enable an analog input, enter the config menu and set the A1 input to Y for yes.
After doing this, 3 new options will appear:

A1.DP, analog 1 decimal point position.
The gauge will show 9999 on the screen, and tapping the first button will move the decimal point.

A1.Lo, analog 1 Low volt
Ov reading which the gauge will show when it sees ZERO volts on the input. -999 through 9999

A1.Hi, analog 1 High volts
5v reading, which the gauge will show when it sees FIVE volts on the input. -999 through 9999

A1.bL and A1.bH, limits of the bargraph for that input.
L is the bargraph start, H is the bargraph end.
You can leave these the same, or shrink the range for better visibility.

LC-1 = BROWN WIRE. LC-2 = YELLOW WIRE.
LC-1/2 default output is 0V = 7.35 AFR and 5V = 22.39 AFR.

To configure our gauge to show this on the first analog input, we would use the following settings:
A1.DP, 2 decimal points, 99.99
A1.Lo, 7.35
A1.Hi, 22.39
A1.bL, 7.35
A1.bH, 22.39

After putting these settings onto the analog input, the gauge will show proper AFR displayed in the Analog 1 gauge mode which will appear in the running mode as AN 1.

Make sure the obd2 connection is secure, try unplugging and replugging it a few times with the car running. Some ports can be stiff.

Check the chart at the top of this page, if your vehicle has a K-Line box, try setting it to Car.3

Check your obd2 port fuse; on a fuse chart this will usually say OBD or DLC.

Is your vehicle compatible?
Check the chart at the top of this page to make sure, read the notes section for details.

If you are still having problems, please email support@p3cars.com or call 1-614-317-3035