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Did you pull the codes?
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Posted by Bill Homer [Email] (#3427) [Profile/Gallery] (more from Bill Homer) on Mon, 2 May 2016 12:23:34 Share Post by Email
In Reply to: Re: Catalytic Converter Fit, Robert, Mon, 2 May 2016 05:05:09
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The 1996+ cars have the advantage of easily accessible OBD-II codes. What code are you getting? The rear oxygen sensor, which is there primarily to indicate failure of the catalytic converter, has at least two error modes:

1. Reading out of range - something is wrong with either the cat or the sensor
2. Oxygen sensor heater is not working properly - there is a heater circuit internal to the sensor so that it warms up and gives more accurate readings faster. I had this failure mode often with a couple of Audis that we used to own (four sensors per car!!!).

If the case is not cracked or rusted out, which you would be able to hear as a fairly loud exhaust leak, the cat is not DIRECTLY causing the smell inside your car - it's possible that oil is leaking down on top of the cat and the fumes of that being burned off is making a smell indirectly. If this is the case, replacement of the cat will not change anything related to the smell.

posted by 108.71.132...

https://www.engine-light-help.com/oxygen-sensor-codes.html


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