01-20-2014, 03:11 PM | #1 |
Drives: 2010 Camaro 1LT/RS, 6M, IBM Join Date: Jul 2009
Location: Austin, TX
Posts: 480
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Check Engine Light
P0420 catalyst system low efficiency bank 1
I haven't modified anything on my Camaro in a couple years, the only bolt-on's I have installed are an Airraid CAI and replaced the mufflers. I haven't touched the cats. Over the past month or so I have gotten this CEL code randomly on some days. Any ideas? |
01-20-2014, 03:19 PM | #2 |
Drives: 2017 1SS 6spd Join Date: Jan 2011
Location: Utah
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How many miles on your car? The driver's side cat could be failing just from use.
Data from the MAF can also cause this code, so I'd also give it a clean! |
01-20-2014, 03:37 PM | #3 |
Drives: 2010 Camaro 1LT/RS, 6M, IBM Join Date: Jul 2009
Location: Austin, TX
Posts: 480
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01-20-2014, 03:51 PM | #4 |
Drives: 2017 1SS 6spd Join Date: Jan 2011
Location: Utah
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Pick up a spray can of cleaner at any auto parts store and follow instructions closely (don't hold it too closely to the sensor) and allow to dry before use. Eazy-peazy!
Cat's should be good for at least 100K miles, hopefully the cleaning will do it. |
01-20-2014, 03:57 PM | #5 |
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Do you race the car? This would cause them to foul prematurely.
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01-20-2014, 04:15 PM | #6 |
Drives: 2010 Camaro 1LT/RS, 6M, IBM Join Date: Jul 2009
Location: Austin, TX
Posts: 480
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01-20-2014, 04:16 PM | #7 | |
Drives: 2010 Camaro 1LT/RS, 6M, IBM Join Date: Jul 2009
Location: Austin, TX
Posts: 480
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Quote:
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01-20-2014, 05:28 PM | #8 |
Drives: 2011 RJT 2LT/RS Convertible Join Date: Nov 2009
Location: Western Massachusetts
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Take a look for an exhaust leak. Typically you can see leaks on the camaro since the cars run rich. Look for black carbon streaks on exhaust joints up front. Seen this before on muffler jobs where moving things around resulted in leaks by the manifold and cats.
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01-20-2014, 06:00 PM | #9 |
Drives: 2017 1SS 6spd Join Date: Jan 2011
Location: Utah
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This what I'm currently using- http://shop.advanceautoparts.com/web...-crc_7070079-p
And Nutbutt's right, could be an exhaust leak. I've heard of a few Camaro owner's stock exhaust manifold gaskets have simply gone bad and starting leaking without provocation. If this persists, there's always a trip to the dealer to fall back on! |
01-21-2014, 07:39 AM | #10 |
Drives: 2010 Camaro 1LS 3.6 LLT V6 325 HP Join Date: May 2009
Location: LS
Posts: 4,242
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That is a pesky code, MAF cleaning is a good start, also torque the exhaust manifold bolts and look for leaks, also fuel injector clean sometimes helps clean the 02's.
Check your glove box manual, the cat is covered under extended warranties.
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2010 Camaro Auto, Inferno Orange, Titanium Interior, Gearhead Wheels AIRAID CAI
Last edited by TooCool5; 01-21-2014 at 08:18 AM. |
01-21-2014, 01:41 PM | #11 |
Drives: 2016 SS Join Date: Jun 2011
Location: Newark, NY
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I had the same issue, took it into the dealer and they replaced the cat under warranty. Mine is also a daily driver, >60,000 miles. I have a Cold Air Inductions CAI but stock exhaust.
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01-21-2014, 02:37 PM | #12 |
Drives: 2010 Camaro 1LT/RS, 6M, IBM Join Date: Jul 2009
Location: Austin, TX
Posts: 480
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Is the cat covered under the 100,000 mile powertrain warranty? How many years does that come with?
I'm at 53,500 miles and have had the car 4.5 years. Sent from my SAMSUNG-SGH-I337 using Tapatalk |
01-21-2014, 02:40 PM | #13 | |
knows 2 facts about ducks
Drives: ...and they're both wrong Join Date: Aug 2009
Location: The HMS Invincible
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Check Engine Light
Quote:
5 year 100,000 miles I believe. But yes, the catalytic converter is covered under the powertrain warranty. |
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01-21-2014, 02:43 PM | #14 |
Drives: 2010 Camaro 1LT/RS, 6M, IBM Join Date: Jul 2009
Location: Austin, TX
Posts: 480
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Think they would give me shit for having the AIRRAID CAI and different mufflers? I know it depends on the dealer ultimately..
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