Man,I'm learning some stuff here!!!
Thread Starter
Team Owner
Joined: Dec 2003
Posts: 57,408
Likes: 164
From: queensbury ny
Man,I'm learning some stuff here!!!
Check engine lite came on,some body else already posted a thread because theirs came on too.then,the guys told me how to go ck.codes and sent me to the link to decipher the codes,etc.this sh$#@t is pretty cool!this car is pretty cool,too!even though it's a tempermental beast!So,not only do i have a very fast car,i can also diagnose it;s codes!!!outstanding!!! 
now,if somebody can tell me why i have p0430-catalyst system low efficiency-codes when i just put in kooks w/new cats about a month and a half ago???
now,if somebody can tell me why i have p0430-catalyst system low efficiency-codes when i just put in kooks w/new cats about a month and a half ago???
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
That's an easy one, bud! You say you added LT's and (I'll assume) aftermarket cats, and wonder why the rear 02 sensors "think something is wrong"?
Basically the function of the rear 02 sensor is to monitor how the exhaust gas is being scrubbed by the cat. converter.
So you have a few variables here; your motor needs a tune (possibly too rich AFR), or those cats aren't working well enough to satisfy the current PCM parameters, or the rear 02 sensor is defective.
Are you getting this code on both banks (usually the last digit of the code will be different, so if you only have a single code you could assume just one side is complaining.)
I've also seen examples of these aftermarket cats failing internally, i.e. the honeycomb falls apart, and that would allow the gas to pass through unfiltered.
Basically the function of the rear 02 sensor is to monitor how the exhaust gas is being scrubbed by the cat. converter.
So you have a few variables here; your motor needs a tune (possibly too rich AFR), or those cats aren't working well enough to satisfy the current PCM parameters, or the rear 02 sensor is defective.
Are you getting this code on both banks (usually the last digit of the code will be different, so if you only have a single code you could assume just one side is complaining.)
I've also seen examples of these aftermarket cats failing internally, i.e. the honeycomb falls apart, and that would allow the gas to pass through unfiltered.
Thread Starter
Team Owner
Joined: Dec 2003
Posts: 57,408
Likes: 164
From: queensbury ny
Codes
i'll have to ck.when i get home if it's one or two codes for the cat's,but it's going to ecs for a cam and a tune,so might that be a fix or correction for the sensor stuff??
Team Owner
Joined: May 2001
Posts: 36,836
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by jessem
i'll have to ck.when i get home if it's one or two codes for the cat's,but it's going to ecs for a cam and a tune,so might that be a fix or correction for the sensor stuff??
Le Mans Master
Joined: Dec 2003
Posts: 5,622
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From: Savannah Georgia
Cruise-In VIII Veteran
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by navy99vert
Get some O2 sims
http://www.thelapd.com/Merchant2/mer...e_Code=thelapd
http://www.thelapd.com/Merchant2/mer...e_Code=thelapd
That's another (little more expensive) option. If the clean-air ***** are as **** as you say they are and crawl up underneath and see the sims, well.... your screwed again. Chances are they won't do a "visual" from underneath like they do in the engine compartment area.
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Le Mans Master
Joined: Dec 2003
Posts: 5,622
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From: Savannah Georgia
Cruise-In VIII Veteran
Originally Posted by jessem
no visual,just a hook up to the pcm.
then tie them up out of the way
Last edited by navy99vert; Jun 26, 2005 at 12:55 PM.