UltraGauge EM, Installation & Operation Manual

Page: 21 / 55

Gauge name Range Units Abbreviation
Bank1 O
2
Sensor 1 Voltage Bnk1 O2 1
Bank1 O
2
Sensor 2 Voltage Bnk1 O2 2
Bank1 O
2
Sensor 3 Voltage Bnk1 O2 3
Bank1 O
2
Sensor 4 Voltage Bnk1 O2 4
Bank2 O
2
Sensor 1 Voltage Bnk2 O2 1
Bank2 O
2
Sensor 2 Voltage Bnk2 O2 2
Bank2 O
2
Sensor 3 Voltage Bnk2 O2 3
O
2
Sensor
Output Voltage
Bank2 O
2
Sensor 4 Voltage
0 to 1.275 Volts
Bnk2 O2 4
Raw output from the O2 sensor. 0 volts is equivalent of 100% lean fuel air mixture and 1.275
volts is 99.2% rich fuel air mixture. Bank1 is the cylinder bank with spark plug #1.
Typically only two O2 sensors are present, one on each bank.
Gauge name Range Units Abbreviation
Miles with CEL on 0 to 40,722 miles mi CEL
Kilometers w/CEL on 0 to 40,722 kilometers km CEL
Distance with
Check Engine
Light on
Distance traveled since the Check Engine Light (CEL) illuminated.
Gauge name Range Units Abbreviation
Fuel Rail diesel PSI 0 to 95,050 PSI FR PSI
Fuel Rail dsl 10kPa 0 to 65535 10kPa FR 10k
Fuel Pressure
(Diesel)
Fuel rail pressure at the engine relative to atmosphere (Gauge pressure), in Pounds per Square
Inch (PSI).
Gauge name Range Units Abbreviation
Bank1 wide O2 Sensor 1 lambda Bnk1 λ 1
Bank1 wide O2 Sensor 2 lambda Bnk1 λ 2
Bank1 wide O2 Sensor 3 lambda Bnk1 λ 3
Bank1 wide O2 Sensor 4 lambda Bnk1 λ 4
Bank2 wide O2 Sensor 1 lambda Bnk2 λ 1
Bank2 wide O2 Sensor 2 lambda Bnk2 λ 2
Bank2 wide O2 Sensor 3 lambda Bnk2 λ 3
Wide O
2
Sensor
Output lamda
Bank2 wide O2 Sensor 4 lambda
0 to 1.999 N/A
Bnk2 λ 4
Wide band O2 sensor output Lambda. Lambda is the measure of the actual Air to Fuel ratio as
compared to the ideal or Stoichiometric value. It is a ratio and has no units.
λ
= Air
MASS
/Fuel
MASS
(Actual)
Air
MASS
/Fuel
MASS
(Stoichiometric)
λ
= 1 = ideal mixture
λ
> 1 = lean mixture
λ
< 1 = rich mixture
Gauge name Range Units Abbreviation
EGR % Flow 0 to 100 % EGR% flow
EGR
Commanded
The percent of flow through the Exhaust Gas Recirculation (EGR) valve, where 0% is closed
and 100% is wide open. This is the commanded value indicating that the Engine Control
Module (ECM) is requesting the EGR to have the desired flow. The actual flow may be
different if there is an issue with the EGR.
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