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P0138 Diagnostic Trouble Code Discussion for October 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
2005 Dodge Grand Caravan 3.3L MIL Lamp on VIN: 2D4GP24R55
P0138: Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage. O2 sensor keeps setting PO138, B1S2 Voltage is high. Reads over 4 volts longer than 30 seconds on initial start-up. Sensor B1S1 works fine. Heater duty cycle shows 100% for B1S1, while problem sensor shows 33% duty cycle on initial start-up. I believe it shoul...
October 12, 2010