I have a 1998 XJ getting OBDII codes
P0138
O2 Sensor circuit high voltage (bank 1 sensor 2)
P0141
O2 Sensor Heater Circuit (bank 1 sensor 2)
Which sensor do I need to replace upstream or downstream?
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Level: Hummer (H2)
Which one is bank 1 sensor 2
I have a 1998 XJ getting OBDII codes
P0138
O2 Sensor circuit high voltage (bank 1 sensor 2)
P0141
O2 Sensor Heater Circuit (bank 1 sensor 2)
Which sensor do I need to replace upstream or downstream?
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