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CEL P0051 code

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Old 07-15-14, 02:02 PM
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samk425
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Default CEL P0051 code
I recently was driving and then my car just randomly popped up with the check engine light, check vsc, and the traction light came on. The car runs fine but, i have to replace the heated oxygen sensor, but I can not find it. Does anyone have a detailed diagram of the is250 engine or know where the sensor is located?

btw I do not have the owners manual
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Old 07-16-14, 12:13 PM
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Gville350
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Which one, there are 4 sensors in total. Either it is in the header, or down-stream in the "downpipe" closer to the secondary cats.
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Old 07-16-14, 12:40 PM
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Originally Posted by Gville350
Which one, there are 4 sensors in total. Either it is in the header, or down-stream in the "downpipe" closer to the secondary cats.
Bank 2 sensor 1
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Old 07-16-14, 12:48 PM
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I believe that passenger side primary on the header.
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Old 07-17-14, 12:22 PM
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I forget which bank is which, but it is definitely the upstream (in-header) O2 sensor.
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