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Old 01/29/2013, 06:18 AM   #1 (permalink)
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O2 sensor location

I have an 01 GT that has the following:

P0161 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)

I looked last night all over the place to find an O2 sensor after the cat. Cant find it. Can anyone tell me where this is? All I see are the 2 just after the headers on either side of the engine.
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Old 01/29/2013, 08:28 AM   #2 (permalink)
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Bank 2 sensor 2 is going to be toward the front of the car. Open up the hood and look a few inches from your front valve cover towards the front. That one sticking out is bank 2 sensor 1. Follow the exhaust down, past the precat, and you'll see sensor 2 sticking out of the pipe. It might be pretty hard to see from up top but you'll be able to see it from underneath. There aren't any sensors after the main cat beneath the car.
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Old 01/29/2013, 10:09 AM   #3 (permalink)
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2000-2002 Eclipse Service Manual | Tearstone

Tearstone has detailed pictures of the location. I used this when I changed my O2 sensors
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Old 01/29/2013, 12:31 PM   #4 (permalink)
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this is exactly what i needed. thanks, guys. the problem for me was in realizing there were 2 converters and they were up beside the engine instead of further back in the exhaust like you normally see.

one more question: i'm looking at a denso unit online as a replacement. says its "OEM". are these ok or do i really need to spend double for an official mitsubishi factory unit?
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Old 01/29/2013, 12:36 PM   #5 (permalink)
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Denso are good
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Old 01/29/2013, 12:37 PM   #6 (permalink)
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There are actually three, but I think that's what you meant anyway. Yes the Denso's are what you need. They're the same ones you'll pull off of there. Avoid other brands or anything "universal." Denso's the way to go.
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Old 01/29/2013, 05:29 PM   #7 (permalink)
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I replaced mine with a Bosch from Autozone and it's been good for 3 years no problems.
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