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2014 Chevrolet Impala
Includes: Bel-air
Platform: B-body & W-body

09 impala lt downstream o2 sensor issues

   
Old Apr 8, 2025 | 4:30 AM
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Yayosworld22
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Default 09 impala lt downstream o2 sensor issues
Hi, I have a 09 impala lt 3.5L engine. It is throwing a P0140 code, so I purchased a new downstream o2 sensor. However, upon trying to replace the old sensor I discovered that the connector the o2 sensor plugs into is badly damaged. In addition, the old sensor was no longer plugged in and was completely missing. So I am having a problem locating where the downstream o2 sensor is supposed to be plugged into. I've watched a million videos and it doesn't seem to be where I'm understanding it's suppose to be. I can only locate the upstream one. Can someone please help me figure this out. I can attach pictures if needed.
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