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01-28-2014, 01:36 PM
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#1 |
 
Drives: 2010 Silver Ice Metallic 1LT Camaro Join Date: Aug 2010
Location: NY
Posts: 58
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Error Codes P0430 and P0420.
Hey guys i had headers put on my car a few weeks ago, been driving fine until this morning when my CEL came on and was given error codes P0420 and P0430. Both are catalyst effiency below threshold. When i had them put in we didnt have time for a tune because of an incoming snowstorm. I cant get back to get the car tuned for another 10 days. I drive approx 25miles per day. Is this something i should be worried about that will cause a bigger problem with the engine or will it be fine until next friday? The guy that did it claims it will be fine until next friday but my friend had headers done and waited for a tune and caused engine damage in his car.
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 Current Mods: K&N Air Charger Cold Air Intake, PaceSetter Long Tube Performance Headers, Flowmaster American Thunder Axle Back Exhaust, 20% Tints. Future Mods: HP Tune, Magnaflow Performance Cat Back Exhaust, Painted Stripes, 10% Tints. |
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01-28-2014, 01:47 PM
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#2 |
         
Drives: Evil Eva, 2010 2SS LS3 Join Date: Aug 2013
Location: Falls Church, Virginia
Posts: 3,600
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No, you will be fine. It is just an error reading because your exhaust is flowing way better than the computer expects it to. There a lot of folks who wait on the tune, and just ignore the CEL.
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"You simply cannot trust quotes found on the internet." -Abraham Lincoln
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01-28-2014, 02:10 PM
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#3 |
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They see me trollin'...
Drives: 217 ci of fury; Chauffeured by SS Join Date: Jul 2011
Location: Oklahoma
Posts: 13,876
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Yeah, just needs a tune, no worries, my guy drove his SS for a while after installing headers without the tune. You'll be okay
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"Never race anything you can't afford to light on fire and push off a cliff." -CamaroSpike
 2011 Custom LT/RS: Bella's Build Thread |
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01-28-2014, 03:12 PM
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#4 |
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Raining Blood
Drives: 2014 SS Performance Sedan Join Date: Oct 2009
Location: facebook
Posts: 2,683
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P0420 are legal in Colorado and Washington.
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Ordered 1/9/12 - Born 2/3/12 - Delivered 2/21/12 - '12 1SS/RS Summit White - TRADED.
 2014 SS Performance Sedan #2974 - Red Hot 2 - S/R. & Spare. Built 01/09/14 #238 of 291 as configured |
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01-28-2014, 03:50 PM
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#5 | |
Drives: 2010 Camaro Join Date: Dec 2010
Location: Pearland, TX
Posts: 611
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Quote:
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01-28-2014, 03:53 PM
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#6 |
Drives: 2010 Silver SS/RS LS3 Join Date: Nov 2011
Location: Colorado Springs, CO
Posts: 882
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I installed my cat delete pipes two weeks ago and have gotten hose same codes, I just clear them so I don't see the light but it'll come back on a day or two later. I did my research too because at first seeing the light you'll freak out. Just wait for the tune and have the rear O2s turned off.
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2010 Silver Ice Metallic Camaro SS/RS LS3
Mods...so far: resonator/muffler delete, tinted everything, '13 shift knob/boot, bowtie delete, PFADT sway bars, CAI intake, Hurst short shifter, JBA cat deletes, BMR trailing arms/outer bushings/steering rack bushing, Bo White ported TB. Rhino79 Dyno tuned...405 HP/399 TQ |
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01-28-2014, 05:20 PM
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#7 |
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Drives: 2010 Silver Ice Metallic 1LT Camaro Join Date: Aug 2010
Location: NY
Posts: 58
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Alrite cool thank you guys. Naturally i got nervous haha. I was ready to use a day off n go tomorrow but if its safe then it can wait.
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Current Mods: K&N Air Charger Cold Air Intake, PaceSetter Long Tube Performance Headers, Flowmaster American Thunder Axle Back Exhaust, 20% Tints. Future Mods: HP Tune, Magnaflow Performance Cat Back Exhaust, Painted Stripes, 10% Tints. |
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01-29-2014, 08:54 AM
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#8 |
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Retarded One-Legged Owl
Drives: 2010 Black Camaro 2SS Join Date: Oct 2008
Location: San Antonio, TX
Posts: 9,745
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I've had long tubes for several years now with no tune. I just have a Bluetooth OBDII reader and I clear my codes with the Torque App on my phone every time the CEL pops up.
You're good 
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01-30-2014, 03:32 PM
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#9 |
 
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I have had the same codes pop up and have cleared them with my Hypertech programmer but they continue to come back. Has anyone else had this problem? It is a real pain in the butt because it will not let me remote start it with the CEL on.
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02-03-2014, 11:00 AM
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#10 |
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"Camaro Joe"
Drives: 2010 SILVER ICE 2LT/RS CAMARO Join Date: Feb 2010
Location: long island ny
Posts: 2,366
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american racing headers has a 49 state legal cat that i used before that will not throw those codes
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02-03-2014, 02:09 PM
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#11 |
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Mother of PWA Babies
Drives: 2011 RJT 2LT/RS Join Date: Apr 2011
Location: Central Pennsylvania
Posts: 37,110
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I had a CEL for about a year with no issues. You are in the same boat as be waiting for a tune.
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05-18-2022, 08:59 AM
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#12 |
 Drives: Chevy Camaro LS Join Date: Oct 2021
Location: Braidwood, IL
Posts: 1
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P0420 P0430 Codes
The CEL is on my v6 2010 LS w/ the P0420/P0430 codes. The mechanic is recommending an o2 sensor extender - any idea if that will work?
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05-18-2022, 10:36 AM
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#13 |
Drives: 2014 Chevy Caprice PPV L77 Join Date: Jun 2021
Location: Toledo, OH
Posts: 23
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Possibly. Some people use a modified spark plug non-fouler to get the post-cat O2 sensor further out of the airflow stream. It may work if you are borderline. Its quick and easy to try and doesn't hurt anything.
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2014 Caprice PPV, 6.0L, BTR Stage 2 LS3 N/A Cam, 2" ARH, 3" custom exhaust, 3.45, Circle D triple disc converter, Lloyd Elliot heads, Rotofab intake, Chris Henry tuned, future LSA....
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