Kooks Long Tubes Catless CEL - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Towerboat · 02-02-2020, 01:25 PM

I Need some advice from all of you that have done my mods. I have a 2013 ZL1 with a Roto-Fab CAI. Just had a set of Kooks long tubes installed without cats and had it tuned. My CEL came on. The tuner said it was the 02 sensors. We replaced them cleared the codes but the Light just came back on 😑 I’ll stop by the shop on Monday to have them check it out. Any ideas???

'10CamaroDude · 02-02-2020, 01:31 PM

They're P0420 and P0430, right, because there are no cats on the Long Tubes. You
need the spacers or spacer mini-cats to clear that up. The REAR sensors are reading
the same as the front sensors because there are no cats. The shop can't clear them
away, and neither can you. They will come right back on with the readings they are
getting without the cats on the car.

RobZL1 · 02-02-2020, 02:20 PM

Or you can also just fix it in the tune. I'm surprised the shop doesn't know how to do that.

tartagliazl1 · 02-02-2020, 02:49 PM

Your tuner should know to turn off the rear o2 sensors. If he doesn’t know that maybe you should take it to somebody else.

Dega Man · 02-15-2020, 12:48 PM

All the advise above is correct. You can program ECM to turn off the rear O2 Sensors and that will eliminate the problem right away.

02-02-2020, 01:25 PM	#1
Towerboat Drives: 2012 RS - 2013 ZL1 Join Date: May 2013 Location: Naples, Fl. Posts: 22	Kooks Long Tubes Catless CEL I Need some advice from all of you that have done my mods. I have a 2013 ZL1 with a Roto-Fab CAI. Just had a set of Kooks long tubes installed without cats and had it tuned. My CEL came on. The tuner said it was the 02 sensors. We replaced them cleared the codes but the Light just came back on 😑 I’ll stop by the shop on Monday to have them check it out. Any ideas??? __________________ "CARPE DIEM"

02-02-2020, 02:20 PM	#3
RobZL1 fo'shizZL1 Drives: 2017 ZL1 Join Date: Aug 2017 Location: ATL Posts: 1,281	Or you can also just fix it in the tune. I'm surprised the shop doesn't know how to do that. __________________ 2017 ZL1 M6 Black \| Maggie 2650 // 103TB // Big Gulp Past Rides- 2014 ZL1 M6 Red Hot \| Tons of mods 2004 CTS-V M6 Silver \| Many mods 1995 Corvette M6 Torch Red \| A few more mods 1992 Camaro M5 White \| A few mods

02-02-2020, 02:49 PM	#4
tartagliazl1 Drives: 2013 zl1 vert Join Date: Dec 2018 Location: Rochester, New york Posts: 949	Your tuner should know to turn off the rear o2 sensors. If he doesn’t know that maybe you should take it to somebody else. __________________ 22% lower/ 2.5 upper/ 2” headers/ cat delete/ x-pipe/ 2 gallon x tank/ 100-3 pump/ fic 850/ dsx aux kit/ 103mm throttle body/ RPM 5” intake/ meth kit/ prometh lid injection/FI interchiller/ 160* stat/ ngk-7/ msd wires/ elite catch can/ tsp cam/ Che trunnions/ ported supercharger/ 1/2” lid spacer/ brick mod/BMR toe and trailing arms/ 751hp 757 tq SAE @17.3lb on a loaded dyno.

02-02-2020, 01:31 PM	#2
'10CamaroDude Account Suspended Drives: 2010 Camaro LS Join Date: Nov 2019 Location: Pgh Posts: 739 View My Garage	They're P0420 and P0430, right, because there are no cats on the Long Tubes. You need the spacers or spacer mini-cats to clear that up. The REAR sensors are reading the same as the front sensors because there are no cats. The shop can't clear them away, and neither can you. They will come right back on with the readings they are getting without the cats on the car.

02-15-2020, 12:48 PM	#5
Dega Man Drives: ZL1 Join Date: Oct 2012 Location: Talladega Posts: 631	All the advise above is correct. You can program ECM to turn off the rear O2 Sensors and that will eliminate the problem right away.