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P0138 with CEL, o2 sensor?

 
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delobud
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Location: Detroit, Michigan

2003 Chevrolet Impala


PostPosted: Wed Jan 02, 2013 2:03 pm    Post subject:  P0138 with CEL, o2 sensor? Reply with quote

Just popped up night, I assume its the o2 sensor (correct me if im wrong please). I have a o2 simulator by the cat so it must be the other under the hood.

Anyone have a pic or write up of where its at and how to change it? I searched by not luck.

Thx

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IffyG
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2002 Chevrolet Monte Carlo
1998 Oldsmobile Intrigue
2009 Chevrolet Malibu


PostPosted: Wed Jan 02, 2013 3:44 pm    Post subject:   Reply with quote

Probably a bad oxygen sensor. I don't think there is a write up for it because it's pretty simple. The oxygen sensor is is the rear manifold right near the middle spark plug. Get an oxygen sensor socket on there and break that sucker loose (sometimes it's a challenge. I had to resort to letting the car warm up a little bit to get mine out when I did the Monte Carlo's). It also helps to rock the engine forwards with an engine tilter or ratchet strap if you have larger hands/arms than average.

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