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P0030 Diagnostic Trouble Code Discussion for December 2014

Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Control Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0030
Help Request Posted
2001 Pontiac Grand Am SE 3.4L MIL Lamp on VIN: 1G2NF12E81
P0030: Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Malfunction. ... one. Sets code P0030 (oxygen sensor heater circuit fault) right after start-up every time, replaced upstream sensor with new Denso part, still sets code, tried Delco sensor, same result. Test says to monitor O2 heater current after 1 minute of operation, s...
December 15, 2014