Join Now
International Automotive Technicians Network

P0138 Diagnostic Trouble Code Discussion for January 2005

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


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0138
Help Request Posted
1995 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W1S
P0138: o2 b1s2 high voltage. ... intermittantly sets p0138 - b1s2 o2 voltage high. The test tree in MOD has you check o2 for operation. Then you jumper o2 sensor high and low wires on ecm side and look for reading ( 35 mv. Got a reading of 18 mv. Tree then directs you to diagnostic aids w...
January 13, 2005
1995 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W1S
P0138: o2 b1s2 high voltage. ... intermittantly sets p0138 - b1s2 o2 voltage high. The test tree in MOD has you check o2 for operation. Then you jumper o2 sensor high and low wires on ecm side and look for reading ( 35 mv. Got a reading of 18 mv. Tree then directs you to diagnostic aids w...
January 14, 2005
1995 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W1S
P0138: o2 b1s2 high voltage. ... intermittantly sets p0138 - b1s2 o2 voltage high. The test tree in MOD has you check o2 for operation. Then you jumper o2 sensor high and low wires on ecm side and look for reading ( 35 mv. Got a reading of 18 mv. Tree then directs you to diagnostic aids w...
January 13, 2005
1995 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W1S
P0138: o2 b1s2 high voltage. ... intermittantly sets p0138 - b1s2 o2 voltage high. The test tree in MOD has you check o2 for operation. Then you jumper o2 sensor high and low wires on ecm side and look for reading ( 35 mv. Got a reading of 18 mv. Tree then directs you to diagnostic aids w...
January 14, 2005