P0240 or P0204 code (bank1)??
Thread Starter
TECH Fanatic
Joined: Nov 2001
Posts: 1,098
Likes: 0
From: I-L-L-I-N-O-I-S
P0240 or P0204 code (bank1)?? https://ls1tech.com/forums/pcm-diagnostics-tuning/313293-non-flashing-ses-light.html
Above is a thread I started last night about an SES light that has come on in my 2002 Z28 and won't go away...
Anyways, the OBD2 scanner showed that code (it is one of those two; I just don't remember exactly how it read) and said something about a "catalytic converter" on it...
The car is bolt-on only and had some Kooks longtubes w/ a Magnaflow catted Y-pipe installed on it last September. I haven't even put 500 miles on it since then though, so I can't see how one of the cats would already go bad? I agree with Larry from Speed Inc that this probably has something to do with the rear O2's...
Could anybody explain to me what exactly that code means and what the problem might be? Because the car runs absolutely perfectly...
Thanks,
Mike
Above is a thread I started last night about an SES light that has come on in my 2002 Z28 and won't go away...
Anyways, the OBD2 scanner showed that code (it is one of those two; I just don't remember exactly how it read) and said something about a "catalytic converter" on it...
The car is bolt-on only and had some Kooks longtubes w/ a Magnaflow catted Y-pipe installed on it last September. I haven't even put 500 miles on it since then though, so I can't see how one of the cats would already go bad? I agree with Larry from Speed Inc that this probably has something to do with the rear O2's...
Could anybody explain to me what exactly that code means and what the problem might be? Because the car runs absolutely perfectly...
Thanks,
Mike
Originally Posted by 2000LS1Z28
https://ls1tech.com/forums/showthread.php?t=313293
Above is a thread I started last night about an SES light that has come on in my 2002 Z28 and won't go away...
Anyways, the OBD2 scanner showed that code (it is one of those two; I just don't remember exactly how it read) and said something about a "catalytic converter" on it...
The car is bolt-on only and had some Kooks longtubes w/ a Magnaflow catted Y-pipe installed on it last September. I haven't even put 500 miles on it since then though, so I can't see how one of the cats would already go bad? I agree with Larry from Speed Inc that this probably has something to do with the rear O2's...
Could anybody explain to me what exactly that code means and what the problem might be? Because the car runs absolutely perfectly...
Thanks,
Mike
Above is a thread I started last night about an SES light that has come on in my 2002 Z28 and won't go away...
Anyways, the OBD2 scanner showed that code (it is one of those two; I just don't remember exactly how it read) and said something about a "catalytic converter" on it...
The car is bolt-on only and had some Kooks longtubes w/ a Magnaflow catted Y-pipe installed on it last September. I haven't even put 500 miles on it since then though, so I can't see how one of the cats would already go bad? I agree with Larry from Speed Inc that this probably has something to do with the rear O2's...
Could anybody explain to me what exactly that code means and what the problem might be? Because the car runs absolutely perfectly...
Thanks,
Mike
http://www.gearchatter.com/viewforum...9b8845f3aa271a
I had a code for bank one and it ended up being my o2 censor on my front driver side. and I just put my headers on so I must of damaged it when I was putting on the LT. this solved my problem. just a thought.
Thread Starter
TECH Fanatic
Joined: Nov 2001
Posts: 1,098
Likes: 0
From: I-L-L-I-N-O-I-S
Originally Posted by 2001NBMZ28
P0420 Catalyst system efficiency below threshold, bank 1 maybe????
