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P0138 Diagnostic Trouble Code Discussion for June 2007

Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage

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Trouble Ticket Help Requests for DTC P0138
Help Request Posted
2000 Nissan Quest GLE 3.3L MIL Lamp on VIN: 4N2XN11T1Y
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Input (Rich Shift). This car was brought in by a new customer,in another shop front and rear 02 sensors were replaced (not original parts)codes po138 and po139 were on I replaced front and rear 02 sensors with original Nissan parts reset the system and 4 days later the Mil was on...
June 02, 2007
2003 Subaru Outback Limited 2.5L MIL Lamp on VIN: 4S3BH68673
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. Just looking for any input, looks like cat is bad to me, downstream o2 acts like cat is not there but why no p0420. also data not available for upstream o2 on genysis scan tool.whats up with that?
June 20, 2007