08-28-2019, 05:02 PM | #1 |
Drives: 2017 Camaro SS Join Date: Jan 2018
Location: Colorado
Posts: 34
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CEL with catback
Hi I recently installed an AWE Tuning track edition catback with AWE link pipes that replace the secondary cats I’ve put about 500 miles on the system.
I got a CEL hooked up an OBD2 reader the code is P0420 catalyst system efficiency below threshold bank 1. Did some research and most say O2 sensor looking at the info from the reader both banks 1 and 2 #1 O2 sensors have no voltage while both banks #2 sensors have voltage. Was wondering if others have experienced this with the O2 sensors not having voltage after installing a new exhaust system any info would be greatly appreciated Thank You |
08-28-2019, 05:11 PM | #2 |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,890
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Sounds like the sensors did not get reconnected after installation. The connectors are in a tough spot from the factory, to be fair to your installer.
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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08-28-2019, 05:48 PM | #3 |
Drives: 2017 Camaro SS Join Date: Jan 2018
Location: Colorado
Posts: 34
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I did the install myself didn’t discount those sensors so I don’t understand why they wouldn’t have any voltage
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08-28-2019, 06:00 PM | #4 |
Drives: 2018 Chevrolet Camaro 2SS 1LE 6M Join Date: Jul 2019
Location: California
Posts: 283
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If the sensors are connected, look for damage to the wiring and connectors. The sensor itself might also have been damaged.
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Bolt-ons.
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08-28-2019, 11:58 PM | #5 |
Drives: 2018 Camaro SS 1LE M6 Join Date: Oct 2018
Location: Northern California
Posts: 345
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Very possible that you could have pulled a wire loose in the O2 harness. Resistance test those bad boys. Or just bite the bullet and buy new sensors. ALSO I thee codes when I did my MBRP. Checks for leaks mainly that weird carbon ring on the driver side and the o-ring gasket on the passenger.
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Camaro 2SS 1LE, MBRP Catback, Mishimoto Catch Can, Rotofab dry, TSP1 7/8” headers,DSX FF, Pray ported MSD, 95mm TB
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09-07-2019, 10:14 PM | #6 |
Drives: 2017 Camaro SS Join Date: Jan 2018
Location: Colorado
Posts: 34
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Replaced both 02 sensors codes cleared was running good put around 500 or so miles on the car sense replacing the sensors now got a CEL again same thing no voltage on sensors 1 both banks any info on why this is happened would be greatly appreciated
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09-15-2019, 10:02 PM | #7 |
Drives: 2017 1LE Join Date: Nov 2017
Location: Brooks, GA
Posts: 697
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It's a very very small leak. I have I it. Comes on and I just reset it. I've no measure any voltage. Dealer says they'll Dix it. Put that little wire gasket on again. I used this but did a poor job. Many use successfully.
Drivers side where pipe slips on behind primary cat.
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'17 Bright Yellow 1LE. PDR, STB, !CAGS
Borla 60606, 11925. Tony Mamo ported TB, ROTOFAB, !Sound Tube Last edited by Chris C 1SS 1LE; 09-15-2019 at 10:04 PM. Reason: Detail |
09-16-2019, 12:07 PM | #8 | |
Quote:
I fought with it for a few months and gave up and installed Headers and high flow cats. No problems now. |
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09-17-2019, 05:35 PM | #9 |
Drives: 2017 SS 1LE Join Date: Sep 2011
Location: Los Angeles
Posts: 154
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Had this same issue with my 2nd cat delete catback. Tried resealing it a few times, but it kept coming back. After some research it appears that others with this issue actually had a bad cat. Took it to the dealer and they replaced my drivers side cat under warranty and problem was resolved.
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2017 1SS 1LE - Eibach Springs | Pray IM | Katech TB | Borla 60606 | Corsa Extreme | E85 Flex Tune
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09-17-2019, 08:01 PM | #10 |
Drives: 2017 Camaro SS Join Date: Jan 2018
Location: Colorado
Posts: 34
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Thanks for the help on this issue looking at doing headers so will need a tune thanks again
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09-19-2019, 07:40 AM | #11 | |
Quote:
Mine did the same thing, when I installed my Stainless Works Cat Back. I got it tuned and no more issues. If the system, you installed, eliminates the secondary cats, then yes you will need a tune.
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2016 Camaro 2SS "Black Widow" |
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09-19-2019, 03:23 PM | #12 | |
Drives: 2018 SS 1LE Join Date: Sep 2018
Location: Ohio
Posts: 143
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Quote:
I have a manual, installed the AWE catback w/o secondary cat delete. Same as OP. No CEL nor tune needed. Secondary cats aren't monitored. OP most likely have a small leak right at the Catback and/or has an Automatic transmission |
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09-20-2019, 02:10 AM | #13 |
Drives: 2017 Camaro SS Join Date: Jan 2018
Location: Colorado
Posts: 34
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I have the M6 so didn’t think a tune was necessary doing a cat back I’ve seen lots of videos and read lots of posts with people removing the secondary cats with no issues went through and torqued everything can’t find any leaks like asrautox said maybe a bad primary cat
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09-20-2019, 07:19 AM | #14 |
Drives: 2018 Camaro 2SS 1LE - Hyper Blue Join Date: Aug 2018
Location: Michigan
Posts: 444
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Had same code with AWE Catback. Need to put muffler paste on the joint connecting the PLP and Primary Cat Outlet. Once I did that, cleared the code, no more issue
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