04-27-2024, 09:42 PM | #1 |
Drives: 2023 ZL1 1LE Join Date: May 2018
Location: Naples
Posts: 105
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Check engine light after exhaust install..
I just installed a GT Haus exhaust. 150 mi. Later I get a check engine light. Has anyone run into this before? Car only has 5700 mi on it.
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2023 BMW X4M Competition (Downpipes, Midpipes, Intake, Exhaust, Tune)
2023 ZL1 1LE BC Forged KXO5, 325/345 Toyo R888R, KPMF Satin Pearl Wrap, GT Haus Exhaust, Girodisc/Carbotech AX6, Race louvers. - Incoming Harrop 2650, Cam etc.. |
04-27-2024, 09:46 PM | #2 |
Drives: '21 ZLE A10 Join Date: May 2012
Location: Mechanicsville, VA
Posts: 6,815
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what code?
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold) |
04-27-2024, 10:03 PM | #3 |
Drives: 2023 ZL1 1LE Join Date: May 2018
Location: Naples
Posts: 105
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Is there a way to pull the code off the driver information center?
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2023 BMW X4M Competition (Downpipes, Midpipes, Intake, Exhaust, Tune)
2023 ZL1 1LE BC Forged KXO5, 325/345 Toyo R888R, KPMF Satin Pearl Wrap, GT Haus Exhaust, Girodisc/Carbotech AX6, Race louvers. - Incoming Harrop 2650, Cam etc.. |
04-28-2024, 12:22 AM | #4 |
2020 Shadow Gray 2SS
Drives: 2020 2SS - A10, NPP, MRC, CAI Join Date: Dec 2019
Location: SoCal
Posts: 3,191
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I don't think so, you'll need an OBD-II reader, they are cheap on Amazon, small plug in dongle that hooks to your phone... $30-$50, WELL worth the investment...
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2020 SGM 2SS - A10, NPP, MRC, Red Calipers, Black Fender Badge, Footwell Lighting
After delivery: - GMP CAI, GMP Black Strut Tower Brace, MRR017 1LE Wheels, SS Armrest, Black Fuel Door, Stainless Pedals, SS Wheel Caps, Black Lugs/Locks, GM Splash Guards, DD Smoked LED Markers, Smoked Rear Reflectors, Mishimoto Catch Can, Xpel PPF - Full Front, SunTek 35% Tint, CeramicPro coating, RST Stainless Brake Lines, Castrol SRF, MSD Super Conductor Wires Left: My "fun" ride. Right: My "work" ride: a Gulfstream G600. One's top speed is 180 Mph, the other, 620 Mph... BOTH are a lot of fun to operate... |
04-29-2024, 05:25 AM | #5 |
Drives: '21 ZLE A10 Join Date: May 2012
Location: Mechanicsville, VA
Posts: 6,815
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no...that trick only works on Corvettes (a C5 can).
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold) |
04-29-2024, 05:26 AM | #6 |
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Probably P0300 like I just had
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04-29-2024, 07:18 AM | #7 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,950
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If it's a cat back, you probably have a small leak at the connection pipes.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
04-29-2024, 09:51 AM | #8 |
Drives: 2023 ZL1 1LE Join Date: May 2018
Location: Naples
Posts: 105
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I found a video on Youtube and ordered the Veepeak which should be here today. Once I find a 10 year old kid to show me how to use it, I will get the code smiling1:
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2023 BMW X4M Competition (Downpipes, Midpipes, Intake, Exhaust, Tune)
2023 ZL1 1LE BC Forged KXO5, 325/345 Toyo R888R, KPMF Satin Pearl Wrap, GT Haus Exhaust, Girodisc/Carbotech AX6, Race louvers. - Incoming Harrop 2650, Cam etc.. |
04-29-2024, 10:46 PM | #9 |
Drives: 2023 ZL1 1LE Join Date: May 2018
Location: Naples
Posts: 105
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The Code is showing as P0420 (Catalyst system efficiency below threshold Bank 1)
I have changed out more cat backs than I can count, I have never seen this before. Any ideas?
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2023 BMW X4M Competition (Downpipes, Midpipes, Intake, Exhaust, Tune)
2023 ZL1 1LE BC Forged KXO5, 325/345 Toyo R888R, KPMF Satin Pearl Wrap, GT Haus Exhaust, Girodisc/Carbotech AX6, Race louvers. - Incoming Harrop 2650, Cam etc.. |
04-30-2024, 06:00 AM | #10 |
Drives: 2023 ZL1 - Modified All Bolt On's Join Date: Dec 2022
Location: Columbus, Ohio
Posts: 687
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I had something similar after installing my long tube headers on my new ZL1. I had accidently sliced one of the wires on the wiring harness that extended to the O2 sensor. I would double check all wiring and make sure all connections are tight. Even though you might not have working around that area. I would double check all wiring connections for the O2 sensors.
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2023 ZL1 Auto - CSP 2" Long Tubes by Stainless Works | Gesi G-Sport High Flow CATs | Stainless Works Legend NPP Axle Back | Roto-Fab Big Gulp | Kong NM103mm | Kong X-Port | Griptech 2.3" Upper | ATI Super Damper w/9.45" (18%) Lower | TooHigh PSI Port Injection w/Siemens 875cc Injectors | Brisk RR14S Plugs | Granatelli Malevolent Coil Packs | Katech Low Profile Billet Valve Covers | Katech Duel Fuel Pump System | MightyMouse Wild 1000HP CC | DSX Flex Fuel Kit | DSX Billet Lid | DMS 2gal Fender Tank | Unlocked T93 TCM | NT555R2's 285/305 | Katech Tuned | Straight E85 = 784rwhp / 678rwtq @ 19psi
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04-30-2024, 07:48 AM | #11 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,950
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You have a leak around the connection by the secondary cat. All you have to do is google code p0420 and 430, you will see how common this is on this platform. A tiny pin hole leak will trigger it.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
04-30-2024, 09:28 AM | #12 |
Drives: 2023 ZL1 1LE Join Date: May 2018
Location: Naples
Posts: 105
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There are no secondary cats, this system removes them. I will take it back to the shop and have them adjust to make sure there are no leaks.
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2023 BMW X4M Competition (Downpipes, Midpipes, Intake, Exhaust, Tune)
2023 ZL1 1LE BC Forged KXO5, 325/345 Toyo R888R, KPMF Satin Pearl Wrap, GT Haus Exhaust, Girodisc/Carbotech AX6, Race louvers. - Incoming Harrop 2650, Cam etc.. |
04-30-2024, 05:07 PM | #13 |
Drives: 2020 Chevy Camaro ZL1 Join Date: Apr 2023
Location: Calgary Canada
Posts: 1,628
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04-30-2024, 09:26 PM | #14 |
Drives: '21 ZLE A10 Join Date: May 2012
Location: Mechanicsville, VA
Posts: 6,815
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snall exhaust leak will cause that code...start the car on ramps and feel for a leak at the front connection pipe area where the slip connection is located
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold) |
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