New Corsa Throwing Code
Thread Starter
Intermediate
Joined: Jun 2020
Posts: 36
Likes: 7
From: Wisconsin
New Corsa Throwing Code
installed a Corsa X pipe and Corsa Sport exhaust today. Sounds awesome but when driving it home I see the check engine light on.
The previous exhaust on my 2005 base was a 3" Z06 NPP the previous owner put on it. Any idea why I would get a code going from the 3" NPP to a 2.5" Corsa?
Have not had a chance to check the codes yet but thought I would ask if anyone had a similar issue.
The previous exhaust on my 2005 base was a 3" Z06 NPP the previous owner put on it. Any idea why I would get a code going from the 3" NPP to a 2.5" Corsa?
Have not had a chance to check the codes yet but thought I would ask if anyone had a similar issue.
Melting Slicks
Joined: Feb 2017
Posts: 3,291
Likes: 1,283
From: Phoenix, AZ to Quakertown, PA.
C6 of Year Finalist (appearance mods) 2019
Sounds like a coincidence to me. I’ve changed out plenty of different exhaust systems and never had that happen. Now when I installed headers and a off road x pipe yes check engine light, but I knew that was coming until I got a tune.
Curious as to what code you pick up. Please report back. Good,luck.
Curious as to what code you pick up. Please report back. Good,luck.
Safety Car
Joined: May 2006
Posts: 3,696
Likes: 492
From: Potomac MD
Check for a vacuum leak. The NPP uses vacuum to operate it. So the vacuum line connects to back of manifold and goes all the way back to the muffler actuators. Corsa on the 3 inch system provides a plug you put in the hose by back bumper.
Safety Car
Joined: Sep 2007
Posts: 4,009
Likes: 491
From: South Florida
It’s not from changing the exhaust, it’s coincidence. I’ve never seen proof that mufflers caused a car to throw a code. Now on some of these newer vehicles I could totally see some of them being that sensitive, but not the c6
Thread Starter
Intermediate
Joined: Jun 2020
Posts: 36
Likes: 7
From: Wisconsin
double06 good idea but i never hooked up the vacuum hoses just ran it open all the time.
also have a Z06 3" NPP for sale with the H pipe. The h pipe has been modified to bolt up to the 2.5" collector.
also have a Z06 3" NPP for sale with the H pipe. The h pipe has been modified to bolt up to the 2.5" collector.
Retired & lovin' it!
Joined: Mar 2005
Posts: 4,475
Likes: 549
From: Jackson NJ
installed a Corsa X pipe and Corsa Sport exhaust today. Sounds awesome but when driving it home I see the check engine light on.
The previous exhaust on my 2005 base was a 3" Z06 NPP the previous owner put on it. Any idea why I would get a code going from the 3" NPP to a 2.5" Corsa?
Have not had a chance to check the codes yet but thought I would ask if anyone had a similar issue.
The previous exhaust on my 2005 base was a 3" Z06 NPP the previous owner put on it. Any idea why I would get a code going from the 3" NPP to a 2.5" Corsa?
Have not had a chance to check the codes yet but thought I would ask if anyone had a similar issue.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Intermediate
Joined: Jun 2020
Posts: 36
Likes: 7
From: Wisconsin
Code is PO449 Evaporative Emission control system vent valve/solonoid circuit malfunction.
I see there is quite a bit of info on the forum so Ill start there. Thinking we may have knocked something loose when installing the new exhaust system.
I see there is quite a bit of info on the forum so Ill start there. Thinking we may have knocked something loose when installing the new exhaust system.
Last edited by Big Red Ram; Oct 21, 2021 at 09:31 PM.
Pro
Joined: Feb 2017
Posts: 611
Likes: 79
From: Fallbrook SanDiego county
Le Mans Master
Joined: Mar 2001
Posts: 8,476
Likes: 3,975
From: Omaha
2020 Corvette of the Year Finalist (performance mods)
C4 of Year Winner (performance mods) 2019
Also check for an exhaust leak at the front of the x-pipe. I know when I did one on my previous C7, I left off the metal gaskets that were on the factory x-pipe as the replacement (Borla) didn't come with them or with any directions. And while it looked like it mated and sounded good, it threw an emissions code. Ordered new metal gaskets (the originals were basically welded to the factory x-pipe), put them in and problem solved.
Thread Starter
Intermediate
Joined: Jun 2020
Posts: 36
Likes: 7
From: Wisconsin
Grpweld the Sports sound great with NO drone. My previous 3" NPPs would drone badly at low rpm on the highway. These are definitely quitter on the highway but bark when you want them to. I even get a nice little burble between gears.
Heel & Toe
Joined: Sep 2011
Posts: 24
Likes: 4
From: Northern Arizona
Thread Starter
Intermediate
Joined: Jun 2020
Posts: 36
Likes: 7
From: Wisconsin
Problem solved, the wire connecting the control module pulled out.
Almost looks like the wrong control module may have been used as there is no locking tab on the module to hold the connecting wire.
Code cleared and working well, thanks for helping me figure it out.
Almost looks like the wrong control module may have been used as there is no locking tab on the module to hold the connecting wire.
Code cleared and working well, thanks for helping me figure it out.
Melting Slicks
Joined: Feb 2017
Posts: 3,291
Likes: 1,283
From: Phoenix, AZ to Quakertown, PA.
C6 of Year Finalist (appearance mods) 2019
Thanks for reporting back and letting us know what the issue was.
Glad you got it straightened out. Now go out and make some noise.
Glad you got it straightened out. Now go out and make some noise.