I have a 1994 Dodge Interpid 3.3L it has code 21 which is a...

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Question by natedog
Submitted on 2/12/2005
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I have a 1994 Dodge Interpid 3.3L it has code 21 which is a oxgen sensor is not flucuating with the pcm. Test the left O2 and it is flucuating, but the right one is not. My Catalytic converter was cloged and melted the EGR sensor the plastic part. My brother got a used EGR sensor from a Dodge strauis I think it was a 4 cyl, but it looked the same so we used. Could this be why the right side is not get any flucuating becuse the EGR is a 4 CYL which would only send to one O2 Sensor becuse it thinks it is a 4Cyl and does not know it is a 6cyl. The code 21 happened after we put in that EGR.

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