XJ-S Convertible (XJ27) L6-4.0L (1996)
HO2S Circuit (HO2S No. 1 Only Shown)
HO2S Characteristic
HO2S Interface Circuit And Characteristic
HO2S Circuit Low Voltage
HO2S Circuit Low Voltage - Bank 1 Sensor 1 P0131
HO2S Circuit Low Voltage - Bank 1 Sensor 2 P0137
HO2S Circuit Low Voltage - Bank 2 Sensor 1 P0151
HO2S Circuit Low Voltage - Bank 2 Sensor 2 P0157
The output voltage of the HO2S is monitored for values which are lower than the expected range. The HO2S low voltage threshold is 14.65 mV.
Possible causes of fault:
-
HO2S signal wire short circuit to ground.
-
HO2S fault.
-
HO2S sensor tip too hot - heater error, or loss of full load enrichment.
-
ECM interface circuit fault.
HO2S Circuit High Voltage
HO2S Circuit High Voltage - Bank 1 Sensor 1 P0132
HO2S Circuit High Voltage - Bank 1 Sensor 2 P0138
HO2S Circuit High Voltage - Bank 2 Sensor 1 P0152
HO2S Circuit High Voltage - Bank 2 Sensor 2 P0158
The output voltage of the sensor is monitored for values which are higher than the expected range. The H02S sensor high voltage threshold is
4.989 V
Possible causes of fault:
-
HO2S disconnected
-
HO2S ground or signal wire open circuit or short circuit to battery voltage
-
HO2S tip too cold - heater error
-
HO2S fault
-
ECM - interface circuit fault
HO2S Circuit - Slow Response
HO2S Circuit - Slow Response - Bank 1 Sensor 1 P0133
HO2S Circuit - Slow Response - Bank 1 Sensor 2 P0139
HO2S Circuit - Slow Response - Bank 2 Sensor 1 P0153
HO2S Circuit - Slow Response - Bank 2 Sensor 2 P0159
Periodic tests on the response rates of the sensors will be compared against reference rates, if the response is lower than the reference, then the test
will fail.
Possible causes of fault:
-
H02S harness fault
-
H02S contaminated
-
H02S fault
Lack of HO2S Switch Indicates Lean