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Old 06-19-2009, 07:17 PM   #1 (permalink)
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Default Rear Oxygen Sensor

I seem to remember reading awhile back that the rear o2 sensor's only purpose is to measure catalytic efficiency. Is this true? On my new mid pipe there is no rear o2 bung. I have to drive a couple hundred miles and was wondering if it would just cause the CEL to come on or if it would in fact cause the car to run poorly.
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Old 06-19-2009, 08:28 PM   #2 (permalink)
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You're fine. The rear only checks the cat. Front O2 sensor will affect performance.
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Old 06-21-2009, 12:14 PM   #3 (permalink)
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yeah rear o2 is for emissions only bullshit
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Old 06-21-2009, 12:27 PM   #4 (permalink)
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Your CEl will come on, but it should just be the P0420 code, cat inefficientcy, won't make the car run any different. Mine comes on with that code about every 100 miles, but I can clear it on the fly with my ScangaugeII, no worries.
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Old 06-21-2009, 12:33 PM   #5 (permalink)
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Just get the o2 sensor raiser from ebay, they're like 20 bucks and fix the CEL no problem !
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Old 06-21-2009, 01:45 PM   #6 (permalink)
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Quote:
Originally Posted by Illnastyimpreza View Post
Just get the o2 sensor raiser from ebay, they're like 20 bucks and fix the CEL no problem !
did you read his post? there is no bung for the rear O2 sensor
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Old 08-08-2009, 05:36 PM   #7 (permalink)
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Default p0420

yo does that actually work the adapter. im getting that fuckin code and it keeps coming back and makes my car backfire sometimes.
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