Aight. I have a 98 Gsr. I went to Autozone and checked the code thing. P0420 and in the book it says that it could be an engine oil leak, cat below threshold, or vaccum leak. Then people are telling me its my o2 censors or its the cat. Does anyone know?!

 

do u have a dummy cat??? if u do u need to get urself a new catalytic converter or changes ur obd2 to obd1 aight

 

I'd say cat or 2nd O2 sensor. Check your warranty book - isn't it 8yr/80k miles for emmissions warranty???

 

i got a 95 gsr, i have the same problem, and its my 2nd O2 snesor needs replaced, i checked it and 1 of the wires was broke, i replaced it and it went off after i removed and reattatched the battery

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95BlkGSR &raquo;</TD></TR><TR><TD CLASS="quote">i got a 95 gsr, i have the same problem, and its my 2nd O2 snesor needs replaced, i checked it and 1 of the wires was broke, i replaced it and it went off after i removed and reattatched the battery</TD></TR></TABLE>

2nd O2 sensor?

i was just under my car yesterday, and there was only 1 i noticed, which was right in front of the cat.

don't all OBD1 (pre 96) cars have only 1 O2 sensor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tnord &raquo;</TD></TR><TR><TD CLASS="quote">

2nd O2 sensor?

i was just under my car yesterday, and there was only 1 i noticed, which was right in front of the cat.

don't all OBD1 (pre 96) cars have only 1 O2 sensor?</TD></TR></TABLE>
that is correct. obd1= 1 o2 sensor.

 

Yeah, but the *only* O2 sensor on a '95 GSR is down at the inlet of the cat. So if you don't know your car really well maybe you think that's the 2nd one...

Besides, how can a '95 car display P0420??

 

yea, well, all i know is that i replaced the one on the cat, and all my problems are gone..., not check engine light, engine running strong