More Code Problems
Thread Starter
Melting Slicks
Joined: Nov 2003
Posts: 2,192
Likes: 120
From: Bennett CO
2015 C5 of the Year Finalist
St. Jude Donor '05-'10
More Code Problems
I just installed Kooks on the car and had it downtown last night and threww a couple codes and check engine light came on, here's codes 10 PCM P0420 and 0430 C and h, and that equates to ; Low Efficiency Band 1-A and 2-A resepctively.
Any ideas
TIA
EBZ0602
Any ideas
TIA
EBZ0602
Drifting
Joined: Oct 2003
Posts: 1,540
Likes: 0
From: bloomfield nj
are you running cats? then again,even if you were,they are probably high flows.you have 2 choices,either get a set of simms or edit the rear o2's out.if you are using cats and rear o2's make sure there are no air leaks around the o2's
Le Mans Master
Joined: Oct 2001
Posts: 5,577
Likes: 3
From: Southern Maryland Maryland
Originally Posted by EBZ0602
I just installed Kooks on the car and had it downtown last night and threww a couple codes and check engine light came on, here's codes 10 PCM P0420 and 0430 C and h, and that equates to ; Low Efficiency Band 1-A and 2-A resepctively.
Any ideas
TIA
EBZ0602
Any ideas
TIA
EBZ0602
Phil
Thread Starter
Melting Slicks
Joined: Nov 2003
Posts: 2,192
Likes: 120
From: Bennett CO
2015 C5 of the Year Finalist
St. Jude Donor '05-'10
Thanks guys,
dbd, I do have cat the matrix high flow. I looked and saw no visible signs of leaks. I can clear the codes, and run up and down the hyw. no problem. It's when I sit and idle that this happens.
Thanks again
EBZ0602
dbd, I do have cat the matrix high flow. I looked and saw no visible signs of leaks. I can clear the codes, and run up and down the hyw. no problem. It's when I sit and idle that this happens.
Thanks again
EBZ0602
Drifting
Joined: Oct 2003
Posts: 1,540
Likes: 0
From: bloomfield nj
Originally Posted by EBZ0602
Thanks guys,
dbd, I do have cat the matrix high flow. I looked and saw no visible signs of leaks. I can clear the codes, and run up and down the hyw. no problem. It's when I sit and idle that this happens.
Thanks again
EBZ0602
dbd, I do have cat the matrix high flow. I looked and saw no visible signs of leaks. I can clear the codes, and run up and down the hyw. no problem. It's when I sit and idle that this happens.
Thanks again
EBZ0602
the rear o2's are cooling off.a couple of ways to fix it:
get it tuned out
try new rear o2's[newer heaters]
install simms
the higher flowing/efficent cats are blowing so much by the 02's[cooling them] that their voltages are staying in sync with the fronts[that's how the pcm knows cat efficency,by looking at the fronts and comparing the rears,if they are close to being the same voltages,the pcm fails the cats].make sure they are tight,no leaks around them[up/down stream]within 6" .if all is ok,try new rear o2's.you can check the o2 fuse for ha-ha's but i would assume it's good because you just have cat faults.
