On a 2001 Pontiac Grand Am GT (3.4L 6 cylinder), is the 'Bank 1, Sensor 1' oxygen sensor the upstream or downstream sensor? From what I've looked up it appears to be the upstream sensor, I just want to make sure so I don't buy the wrong part. Thanks a lot!

Asked by mickprops Jun 21, 2013 at 07:50 AM about the 2001 Pontiac Grand Am GT

Question type: Maintenance & Repair

I took it to a family friend who ran diagnostics on it and was told to get a Bank 1, Sensor 1
position Oxygen sensor.  From what I understand the Grand Am has two oxygen
sensors.. one upstream and one downstream.  From an internet search I've seen 'Sensor
2' referred to as downstream which leads me to believe that Sensor 1 would be upstream.
Let me know if I can provide any more info that would help.

178,485

tenspeed answered 12 years ago

It might have three O2 sensors. "Bank 1" and "Bank 2" are telling you which side of the engine the sensor is located. "Sensor 1" is the upper O2 sensor. "Sensor 2" is the O2 sensor downstream of the catalytic converter. --- I don't know if your V6 has one or two upper sensors.

3 people found this helpful.

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keyman1949 answered 7 years ago

I have a 2003 v6 and there is only one upstream sensor on the rear bank.

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On a 2001 Pontiac Grand Am GT (3.4L 6 cylinder), is the 'Bank 1, Sensor 1' oxygen sensor the upstream or downstream sensor? From what I've looked up it appears to be the upstream sensor, I just want to make sure so I don't buy the wrong part. Thanks a lot! 2 Answers

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On a 2001 Pontiac Grand Am GT (3.4L 6 cylinder), is the 'Bank 1, Sensor 1' oxygen sensor the upstream or downstream sensor? From what I've looked up it appears to be the upstream sensor, I just want to make sure so I don't buy the wrong part. Thanks a lot!

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On a 2001 Pontiac Grand Am GT (3.4L 6 cylinder), is the 'Bank 1, Sensor 1' oxygen sensor the upstream or downstream sensor? From what I've looked up it appears to be the upstream sensor, I just want to make sure so I don't buy the wrong part. Thanks a lot!

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