bank is running lean. The scan tool will display a high voltage reading when that cylinder bank is running
rich.
HO2S Bank 1 Sensor 2
This parameter displays the voltage from the signal produced by the heated oxygen sensor used to
monitor catalyst efficiency for cylinder bank 1. The scan tool will display a low voltage reading when that
cylinder bank is running lean. The scan tool will display a high voltage reading when that cylinder bank is
running rich.
HO2S Bank 2 Sensor 1
This parameter displays the voltage from the signal produced by the heated oxygen sensor used to
monitor fuel trim for cylinder bank 2. The scan tool will display a low voltage reading when that cylinder
bank is running lean. The scan tool will display a high voltage reading when that cylinder bank is running
rich.
HO2S Bank 2 Sensor 2
This parameter displays the voltage from the signal produced by the heated oxygen sensor used to
catalyst efficiency for cylinder bank 2. The scan tool will display a low voltage reading when that
cylinder bank is running lean. The scan tool will display a high voltage reading when that cylinder bank is
running rich.
HO2S Heater Bank 1 Sensor 1
This parameter displays the current through the control module when the bank 1 sensor 1 HO2S heater is
commanded ON by the control module. HO2S Heater Bank 1 Sensor 1 is a range of values indicating a
low current when the heater circuit resistance is high to a high current when the heater circuit resistance is
low.
HO2S Heater Bank 1 Sensor 2
This parameter displays the current through the control module when the bank 1 sensor 2 HO2S heater is
commanded ON by the control module. HO2S Heater Bank 1 Sensor 2 is a range of values indicating a
low current when the heater circuit resistance is high to a high current when the heater circuit resistance is
low.
HO2S Heater Bank 2 Sensor 1
This parameter displays the current through the control module when the bank 2 sensor 1 HO2S heater is
commanded ON by the control module. HO2S Heater Bank 2 Sensor 1 is a range of values indicating a
low current when the heater circuit resistance is high to a high current when the heater circuit resistance is
low.
HO2S Heater Bank 2 Sensor 2
2004 Hummer H2
2004 ENGINE PERFORMANCE Engine Controls (Diagnostic Information & Procedures) - 4.8L, 5.3L, and 6.0L -
Hummer H2