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Bad oxygen sensor bank 1, sensor 1???

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Old Apr 21, 2014 | 10:17 PM
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Bad oxygen sensor bank 1, sensor 1???

Car threw a check engine light and the error says o2 bank 1 sensor 1 is bad. What side of the engine is this on? I know that it is the upstream sensor, just not sure if it is the drivers side or passenger side. Thanks in advance.
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Old Apr 22, 2014 | 01:57 AM
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Unplug one sensor and see what code/bank it says was unplugged.

I think 1 is driver but I can't remember for sure.
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Old Apr 22, 2014 | 06:38 PM
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I think bank 1 is the driver's side as well.
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Old Apr 22, 2014 | 09:39 PM
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ya'll thought wrong. right side if your sitting in the car. left side if you were staring at the engine. - i see your in maryland so yes passenger.

Last edited by roadtalontsi; Apr 22, 2014 at 09:42 PM.
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Old Apr 22, 2014 | 09:53 PM
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bank 1 is passenger, sensor 1 should be precat
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Old Apr 23, 2014 | 07:55 AM
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Thanks for the correction.
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Old Apr 23, 2014 | 02:52 PM
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Originally Posted by roadtalontsi
ya'll thought wrong. right side if your sitting in the car. left side if you were staring at the engine. - i see your in maryland so yes passenger.

Thank you so much! I looked at the engine and thought that cylinder one was on the passenger side of the car but I wanted to make sure. Thanks again!
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Old Apr 23, 2014 | 04:06 PM
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Originally Posted by BerBer63
bank 1 is passenger, sensor 1 should be precat
+1, its the upstream sensor precat
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