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P0140 Diagnostic Trouble Code Discussion for November 2009

Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity

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Trouble Ticket Help Requests for DTC P0140
Help Request Posted
2000 Saturn LS1 2.2L MIL Lamp on VIN: 1G8JU52FXY
P0140: Heated Oxygen Sensor (Bank 1 Sensor 2) Signal Insufficient Activity. Data is stuck at ~455mv running or not and plugged in or not. All wires ohmed out perfect. Customer had replaced O2 sensor and we replaced it again after replacing pcm with no change. This is a pretty plain and simple circuit and has us baffled. Thank you in a...
November 17, 2009