Empatho

iTrader: (16)

My 02 z28's Y-pipe(aftermarket slp) started hitting the drive-shaft tunnel brace really bad yesterday when I was driving slow in a parking lot (m6 car). Later that day when I was getting on the freeway I gave it some gas getting around 4k rpm and the service engine light came on. I checked the codes and I only had this code P0151 (o2 circuit low voltage bank 2, sensor 1). Does this code mean that it got lean? and I have another question, could the y-pipe hitting the drive-shaft tunnel brace cause this or is it time for new oxygen sensors? I put some washers the brace so it doesn't hit anymore.

Empatho

iTrader: (16)

I deleted the code today in the morning and drove around for a little bit but a few minutes ago I went for a spirited drive on the freeway to see if I could get the code again. Right after getting off the freeway I got the service engine light but I couldn't read the code because autozone was closed. Now I'm sure the y-pipe didn't cause the light to come on. Do you guys think it is a bad 02 sensor?

Empatho

iTrader: (16)

I cleaned the MAF yesterday night and I tried to get it scanned today but the clowns wanted me to wait 2 hours to have my **** scanned. I did notice that while the car is idling I could hear a faint popping coming from the exhaust, like a small quiet backfire. I also noticed the car backfires sometimes when I shift from 1-2 gear around 2000-3000k rpm. I already ordered some denso 02 sensors from amazon but its gonna take a while to get them. Anyone have any ideas?

JaYZeig

iTrader: (11)

replace the sensor..sensor is probably old, and getting lazy

LS6427

iTrader: (2)

sounds like failing 02 sensor(s) to me.

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Empatho

iTrader: (16)

I went to buy a scanner to check the light again and got only one code but it is a different one this time. I got code P1153 and it does look like I need to replace the 02. Thanks guys, I will report back as soon as I get the 02 sensors from amazon.

Empatho

iTrader: (16)

I replaced the 2 pre cat oxygen sensors and drove around for a couple of miles without any codes popping up, so it looks like the problem is fixed. I did notice that the passenger side sensor was really black and clogged up.