Throwing codes and misfires/bucking
Thread Starter
Teching In
Joined: Jan 2010
Posts: 15
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From: Arkansas
Throwing codes and misfires/bucking I have a 2002 camaro ss. I have long tube heads and off road y pipe so no after cat O2 sensors. I haven't had the codes tuned out yet. Now the problem... 2 weeks ago I got gas and immediately after it started the misfires/bucking. I put some stable in it and it went away until the other day when it got REALLY bad. I'm throwing the following codes p0300 random misfire, p0131 oxygen sensor circuit low voltage bank 1 sensor 1, p0140 and p0160 O2 no activity bank 1/2 sensor 2, and p0171 bank 1 system too lean. Could the bank 1 sensor 1 be causing the random misfires? Or could I really be water from the first gas fill up. (I'm currently on my 2nd fill up since then)
The rear 02's shouldn't cause any misfiring, they just let you know that the cats are working or non existent.
But I noticed my car ran poor when my cats went bad, they say it doesn't affect performance but I felt it.. Especially at idle.
I would start with deleting the rear o2's and delete the old codes and see what comes back on
But I noticed my car ran poor when my cats went bad, they say it doesn't affect performance but I felt it.. Especially at idle.
I would start with deleting the rear o2's and delete the old codes and see what comes back on
Swap L & R O2 sensors and clear codes. If codes come back as P0151 and P0174, then it is the O2 sensor causing the misfires. If the codes stay as P0131 and P0171, then it is actual misfires on the drivers side cylinders causing the O2 and lean codes.
