I am getting a failed test on Bank 1 Sensor 1 and Bank 4 Sensor 4 O2 sensor

2005 CADILLAC SRX
65,000 MILES • 3.6L • V6 • RWD • AUTOMATIC
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MHERRING0209
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I am trying to locate all the upstream and downstream O2 sensors due to the problem with Bank 1 Sensor 1 and Bank 4 Sensor 4.
Aug 8, 2015 at 3:05 PM
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HMAC300
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see pic
Image (Click to enlarge)
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Aug 10, 2015 at 7:23 AM
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MHERRING0209
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The picture addresses Bank 1 Sensor 1, but what about Bank 4 Sensor 4?
Aug 10, 2015 at 8:31 AM
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HMAC300
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thee is no bank4 who ever told you that what is in pic is all the sensors there are....there are two sensors pre and two sensors post of converter. that is all. either that or someone is trying to take advantage of you Or they don't know what they are talking about.
Aug 10, 2015 at 9:32 AM
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MHERRING0209
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Are there any pre sensors like on the Engine vs the Exhaust?
Aug 10, 2015 at 9:35 AM
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HMAC300
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the only O2 sensors are the ones that are shown in the pic. there are quite a few on the engine itself try to find out what eh problem is or the code go from there.
Aug 10, 2015 at 9:53 AM