please help knock sensor and o2 sensor code

black96SE-R · Oct 25th, 2005, 04:36 PM

a few days ago i had to replace the exhaust manifold gasket on my 200sx and instead of actually taking the headers completeyl out i just took the nuts off and loosened the header downpipe from the rest of the exhaust got the gasket on with no problem, but the next mourning on my way to work my check engine light came on. took it to auto zone and they said it was for the knock sensor and the o2 sensor in the cat. is it possbiel that i moved something to casue these both to go off at once. these sensor are expensive please help.,

SupraMK3 · Oct 26th, 2005, 06:13 AM

o2 sensor are fairly cheap if it's a single wire type. If it's a factory item only then it can get expensive.

Twiz · Oct 26th, 2005, 09:14 AM

Apparently your exhaust's still leaking or you just need to reset your ECU... There's a helpful sticky in the B14 Forum that shows you how to retrieve error codes and how to clear them. I don't know which gasket you were replacing but you have to separate the two parts completely to scrape off the old gasket and prepare the surface.

ittamaticstatic · Oct 26th, 2005, 10:24 AM

more then likely the 02 sensor went bad. You OBDII in a 96 so it's heated.