06-04-2023, 12:03 AM | #1 |
Drives: 2023 Riverside Blue 2SS Join Date: Sep 2022
Location: Denver,CO
Posts: 203
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P0420 and P0430 after Longtube Headers
Is there anyway to permanently disable these codes? I know there wasn’t an installation issue because the Tuner said everything looked fine on their side and there were no leaks. I know tuners avoid the emissions sensor like the boogeyman but it really sucks not having auto start and having a CEL on 24/7.
If anyone else had this issue how did you fix it? Do the mini cat spacers that go on the 02 sensor work? |
06-04-2023, 12:11 AM | #2 |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 12,011
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These may be permanent codes that cannot be erased. AFAIK the tuner is supposed to disable such codes prior to first starting the car after header installation, otherwise the codes will stick around...
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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
06-04-2023, 12:16 AM | #3 |
Drives: 2023 Riverside Blue 2SS Join Date: Sep 2022
Location: Denver,CO
Posts: 203
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So with that I’m pretty much screwed and clearing codes after every drive.
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06-04-2023, 02:29 AM | #4 |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 5,115
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This topic has been discussed at length on this board with the warning that this was the deal. You have to tune out hardware codes BEFORE you install the new equipment. And now that HP Tuners is no longer allowing that, you’ll need to run cats of some kind of sufficient quality to allow the exhaust to pass the car’s diagnostic checks. Permanent codes will not go away as Arpad alluded to. The car has to see that the problem has been resolved.
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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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06-04-2023, 07:04 AM | #5 | |
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06-04-2023, 07:15 AM | #6 |
Drives: 2017 Camaro SS, 2011 Corvette GS Join Date: Feb 2019
Location: Erlanger, Kentucky 41018
Posts: 830
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I am running Kooks headers with cats and with a proper tune, the codes will not appear.
When I had my car tuned, I asked my tuner about disabling the codes. He said that he does not do that and disabling codes is a bad idea. Properly tuned, you won't get codes. But you do need the Kooks cats. The only time I have thrown codes with the Kooks headers was when an O2 sensor backed out and was loose. Another time, I just need to retorque the header bolts after a few heat cycles and the codes I was getting went away. |
06-04-2023, 08:08 AM | #7 |
Drives: 2020 Camaro 2SS A10 Join Date: Jun 2018
Location: Here
Posts: 1,493
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When did this change? When I got my headers it was tuned out summer of 2021?
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2020 Camaro 2SS A10 | Rebuilt by: CBI Street Cars | 2" SE LT Headers | 3" SE X-Pipe | 3" MBRP Axle-Back | Pri & Sec Cat Deletes | Roto-Fab CAI | LT2 Ported | 95mm ZR1 TB | LSA crankshaft conversion w/modified crank gear | LS1 thrust bearing | LS MSD Plug Wire Set | BTR Stage I Cam | ARP Rod Bolts | Delphi Lifter set | NGK LTR5IX-11 spark plug set | DOD Delete | VVT Limiter | ECM, TCM & E85 | Retuned by: Justin L. | Dyno: 510 rwhp 472 rwtq | Best 1/4 Time: 11.639
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06-04-2023, 08:26 AM | #8 | |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 12,011
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Quote:
Worth holding on to 4.x if you have it, although I'm not sure you can get away with never connecting to their servers again, at which point they can still do whatever they want, say, block your ability to tune using the older version. (I don't know for sure, because haven't tried to read/write anything since their new software came out.)
__________________
2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
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06-04-2023, 09:04 AM | #9 | ||
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 5,115
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Quote:
Quote:
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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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06-04-2023, 09:05 AM | #10 | |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 5,115
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Quote:
__________________
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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06-04-2023, 10:07 AM | #11 |
Drives: 2023 Riverside Blue 2SS Join Date: Sep 2022
Location: Denver,CO
Posts: 203
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06-04-2023, 01:25 PM | #12 |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 5,115
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May need to be the Green Cats since they’re rated 49 state legal. The high flow ones often don’t have enough substrate to satisfy the post cat O2 sensors.
__________________
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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06-04-2023, 02:26 PM | #13 |
Drives: 2SS M6 Hot Wheels #515 Join Date: May 2020
Location: Virginia
Posts: 118
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Can't speak to the high flow cats but I also have the Kooks green cats and have had no issues or codes.
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Rotofab, Soler 87mm ported TB, Kooks headers / green cats, MSD wires, flex fuel
Stock intake (no porting) and stock NPP exhaust. |
06-05-2023, 09:08 AM | #14 | |
Drives: 2020 Camaro 2SS A10 Join Date: Jun 2018
Location: Here
Posts: 1,493
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Quote:
__________________
2020 Camaro 2SS A10 | Rebuilt by: CBI Street Cars | 2" SE LT Headers | 3" SE X-Pipe | 3" MBRP Axle-Back | Pri & Sec Cat Deletes | Roto-Fab CAI | LT2 Ported | 95mm ZR1 TB | LSA crankshaft conversion w/modified crank gear | LS1 thrust bearing | LS MSD Plug Wire Set | BTR Stage I Cam | ARP Rod Bolts | Delphi Lifter set | NGK LTR5IX-11 spark plug set | DOD Delete | VVT Limiter | ECM, TCM & E85 | Retuned by: Justin L. | Dyno: 510 rwhp 472 rwtq | Best 1/4 Time: 11.639
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