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P0138 Diagnostic Trouble Code Discussion for July 2014

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

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Trouble Ticket Help Requests for DTC P0138
Help Request Posted
2011 Toyota RAV4 2.5L MIL Lamp on VIN: 2T3BF4DV5B
P0138: o2s high voltage bank 1 sensor 2. ... this one. This rav 4 keeps setting a p0138. customer bought vehicle from auction so i have no other repair history other that customer changed b1s2 before he broughtvehicle to me. the upstream AFS reads pretty steady around 3.3v. the down stream ho2 reads ...
July 15, 2014
2007 Jeep Grand Cherokee Laredo 3.7L MIL Lamp on VIN: 1J8GR48K37
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. codes are active 2 min's after starting engine. no other problems.when i jumper signal feed to signal return the voltage is 2.49 and that is normal.ground ok and heater control line produces same voltage on all sensors.both the ones with a problem and without....
July 23, 2014
2004 Dodge Grand Caravan SE 3.3L MIL Lamp on VIN: 1D4GP24R54
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. ... would like to get some opinions on. Fault P0138 (O2 sensor 1/2 high voltage). PID for sensor 1/2 is pegged at 4.8V and intermittently drops to 0V and right back up to 4.8V. Here are my test results: Signal wire, O2 1/2 disconnected, KOEO, 2.5V Signal wire...
July 31, 2014