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P0155 Diagnostic Trouble Code Discussion for May 2015

Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Performance

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Trouble Ticket Help Requests for DTC P0155
Help Request Posted
2000 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on VIN: 3GNFK16T1Y
P0155: Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Circuit Malfunction. I start with seeing bank 1 sensor 1 low activity. I see also o2 sensor 2 heater code. I install owner supplied o2 and still no activity. Can see .45 volts on both o2s. I also notice fuel trim both short term and long term on 0 all 4. Thats not normal. I'll tes...
May 09, 2015