P3 Gauges

BLUE = Analog input 2 

YELLOW BLACK PURPLE = Analog boost sensor (ABS) connection

GREEN = Dimmer wire*

*Dimmer wire needs to be connected to any wire that ONLY receives power when the headlamps are turned on (does not receive power when headlamps are off)

 If the gauge sees more than 5 volts on the green wire, it dims the display, if it does not see voltage on the green wire, it leaves the display bright.

To configure your gauge for auto-dimming-

1- HOLD both buttons until you see “ConF”
2- You will see either “d.On” , “d.On.A” , “d.On.P” or “d.Off”.
3- TAP the left button until it says “d.On.A”
4- HOLD the right button to save/exit.

If your green wire is hooked up an acceptable wire for auto-dimming, your gauge will now auto-dim when the headlamps are on.

d.On = default setting, gauge always starts in bright mode 

d.Off = Lockout / Valet, display off. Enter config with car OFF to re-enable from valet.

On.A = Auto dimmer (must attach green wire on OBD2 harness to circuit that only receives power when headlamps are on)

On.P = persistent dimmer, (stays on last setting until changed)

Units setting: En.Y / En.n / En.b / En.c 

En.Y= (English) Boost in PSI / Speed in MPH / Temperature in Fahrenheit

En.n = (Metric) Boost in BAR / Speed in Km/H / Temperature in Celsius

En.b = Boost in PSI, all other data in Metric

En.c = Temperature in Celsius, all other data in English

Boost Pressure Resolution: Pr0.1 / Pr0.5 / Pr0 0.1

Pr0.1 = Boost shown in 1/10th PSI increments 

Pr0.5 = Boost rounded down to nearest 1/2 PSI

Pr0 = Boost rounded down to nearest whole number PSI

Vacuum Bar graph: U.bg.Y / U.bg.n 

U.bg.Y= Bar graph indicates boost by moving left to right. Bar graph indicates vacuum by moving right to left

U.bg.n= Bar graph indicates boost by moving left to right. Bar graph does not indicate vacuum.

Shift Light: SL.xx 

RPM shown in x100= (“SL.57″= Shift light.5700 RPM) Can be set from 30-99

Boost Reading Selection: bSt.d / bSt.A / bSt.n / bSt.F / bSt.c 

bSt.d= digital boost read through OBD2 port

bSt.A= analog boost read through add-on analog boost sensor

bSt.n= no boost displayed (naturally aspirated)

bSt.F= digital boost read through OBD2 port on certain flashed ECUs (see configuration chart for details)

bSt.c= digital boost read through OBD2 port from charge pipe MAP sensor (see configuration chart for details)

Analog Input Configuration (see the analog inputs section for details): A1.n / A1.Y / A2.n / A2.Y

A1.n= Analog input 1 (brown on wire OBD2 harness) disabled

A1.Y= Analog input 1 (brown wire on OBD2 harness) enabled

A2.n= Analog input 2 (blue wire on OBD2 harness) disabled

A2.Y= Analog input 2 (blue wire on OBD2 harness) enabled

Car Selection: CAr.x / Anl.g (not available on all models)

CAr.x= Select the appropriate car setting according to the configuration chart

Anl.g= “Analog only” mode. Allows gauge to read only Boost and battery voltage without communicating on the vehicle network. Requires add-on analog boost sensor

Code Clearing: Clr.C

HOLD the left button until screen goes blank or “Clrd” is displayed to clear codes. See Code Reading and Clearing section above for details.

Code Reading enable/disable (K-Line vehicles only): rdC.n / rdC.Y

rdC.n= Code reading disabled (gauge not delayed on startup)

rdC.Y= Code reading enabled (gauge may be delayed on startup)

Analog Boost Sensor Calibration (required after installing analog sensor): CaL.b 

(with your engine and ignition completely off)
1- TAP the left button (the gauge will then say “open air sensor” or “shut off engn” and then “TAP.1”)
2- TAP the left button again (the screen will then flash a few times and then shut off)
3- Wait 10 seconds
4- start your car and check your reading

You can also double-check this by unplugging the hose from your analog sensor while the car is running. If the gauge shows “0.0” with the hose unplugged, it is calibrated correctly.

Advanced Protocol Setting: Sh.A / Sh.Y / Sh.n / Sh.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