Need to change driver side cat, will it shut off SES?
03-04-2010 | 07:10 PM
#1
Thread Starter
Teching In
Joined: Jan 2010
Posts: 20
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Need to change driver side cat, will it shut off SES? Reoplacing driver side cat with direct-fit Magnaflow and wanted to know if it will shut of SES or will I have to have it tuned out and will it still pass smog in Cali?
03-04-2010 | 07:48 PM
#2
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Joined: Dec 2005
Posts: 2,928
Likes: 11
From: CT
depends on what the SES/CEL trouble code was for LOL
what was the trouble code??
what was the trouble code??
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06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
03-04-2010 | 09:28 PM
#4
The code might, or not, actually be about the cat.
The PCM is looking at the rear O2 sensor against the
front, for differences (no difference = cat does nothing,
according to the thinking). But the same code can also
come from O2 sensor faults, lack of heat (two sleepy
O2s give the same, nothing-much, result) etc.
If you have had other rear sensor codes before, then
the cat is not the best place to throw money right off.
Resetting the code and swapping rear O2s side-side
is a zero cost, small effort experiment. Code comes
back same side, swap the cat. Comes back, other side,
replace the sensor that you moved.
Now you could also pull the cat and see if any chunks
fall out.
The PCM is looking at the rear O2 sensor against the
front, for differences (no difference = cat does nothing,
according to the thinking). But the same code can also
come from O2 sensor faults, lack of heat (two sleepy
O2s give the same, nothing-much, result) etc.
If you have had other rear sensor codes before, then
the cat is not the best place to throw money right off.
Resetting the code and swapping rear O2s side-side
is a zero cost, small effort experiment. Code comes
back same side, swap the cat. Comes back, other side,
replace the sensor that you moved.
Now you could also pull the cat and see if any chunks
fall out.
