2004 Impala LS senor unplugged, can you identify?? - Chevy Impala Forums
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2004 Impala LS senor unplugged, can you identify??

we just recently purchased a 2004 Impala LS and noticed under the hood that a sensor is unplugged and plugged it in and car started idling really rough and when you drive it acts like it wants to stall putting that in was the only change it is located almost up against the firewall right in the center of the engine compartment on top. I have researched on here and online. I believe it's an O2 sensor but can anyone tell me for sure and what I need to do to repair this issue?
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