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P0138 Diagnostic Trouble Code Discussion for June 2010

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

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Trouble Ticket Help Requests for DTC P0138
Help Request Posted
2008 Jeep Grand Cherokee Limited 4.7L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1J8HR58N58
P0138: B1S2 O2 signal high voltage. ... leaks. None found. Observed O2 readings in my solus pro scan tool and O2 readings are close to desired voltage. Most of the time it is pretty smooth. At other times appears to have a dead miss. Cannot pinpoint any cylinder. Cyl.7 seems the worst and is the...
June 02, 2010
1999 Volvo V70 2.4L MIL Lamp on VIN: YV1LW55A9X
P0138: B1S2 Oxygen Sensor malfunction. After reading some IATn posts decided to find OE sensors. Relizing it is a Denso system, I tracked some down thru denso's site. Getting ready to install them and decided to check voltages. Both the signal wire and the sensor ground On the front sensor have Hav...
June 18, 2010