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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15201
Experience:  GM Grand Master Technician 2007. 14 years experience.
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Engine light came on. used code reader codes were P0161-

Customer Question

Engine light came on. used code reader codes were P0161- P0158- P0060. Bought o2 sensor for Bank 2 sensor 2 replaced and reset codes. The second time I switched engine on engine light came back on. Checked both o2 fuses under hood both good. Disconected neg cable and pos cable held cables together for 15 seconds and hooked back up. cleared codes started engine no light on dash. shut truck off restarted and engine light came on.
JA: Have you checked the fuses? The dashboard bulbs?
Customer: The o2 fuses under hood were good. dashboard lights up.
JA: What is the model/year of your Chevy?
Customer: 2012 chevy avalanche.
JA: Are you fixing your Avalanche yourself? What have you tried so far?
Customer: Yes I am. I told you what I did in first sent email.
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 7 months ago.
Category: Chevy
Expert:  david craig replied 7 months ago.

Hi Im David, P0161 CHEVROLET - HO2S Heater Performance Bank 2 Sensor 2 Possible causes - Faulty Rear Heated Oxygen Sensor Bank 2 - Rear Heated Oxygen Sensor Bank 2 harness is open or shorted - Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection - Inappropriate fuel pressure - Faulty fuel injectors - Intake air leaks - Exhaust gas leaks
P0158 CHEVROLET - HO2S Circuit High Voltage Bank 2 Sensor 2

P0060 - HO2S Heater Resistance Bank 2 Sensor 2

are you sure you replaced the correct sensor?