More codes now 420 and 430
Thread Starter
Cruising
Joined: Oct 2000
Posts: 13
Likes: 0
From: Del Rey Oaks ca
More codes now 420 and 430
i recently had some codes come up on my vette and afgter 2 weeks in gthe shop I got it back and they said all codes have been erased. I should drive it for awhile before I get it smoged. Took it back to the shop and it would not pass smog due to no check engine light. Drove the car about 2 miles and what do you know the check engine light came on showing codes 420 and 430. I returned it to the shop saying they have to tune the car to remove these codes.
Could someone give me a some advice before they have the car another week and $500.00 to $1,000.00 later.
Thanks,
Frustrated corvette owner
Could someone give me a some advice before they have the car another week and $500.00 to $1,000.00 later.
Thanks,
Frustrated corvette owner
Burning Brakes
Joined: Feb 2005
Posts: 752
Likes: 1
From: Tulsa OK
Originally Posted by 97 SC Cobra
My car had the same codes after I installed my Kooks and hi flo cats.
The codes indicate an efficiency problem with the cats. My car is running rich and needs a tune. The hi-flow cats can't handle the rich condition. I just delete the codes when they appear and wait for the next time. Hopefully the tune will solve the problem.
Burning Brakes
Joined: Jan 2006
Posts: 1,170
Likes: 27
From: Magnolia Greens NC
420 & 430 Codes
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Check My 1/20 Post on the cure
Originally Posted by EStreeter
Same here.
The codes indicate an efficiency problem with the cats. My car is running rich and needs a tune. The hi-flow cats can't handle the rich condition. I just delete the codes when they appear and wait for the next time. Hopefully the tune will solve the problem.
The codes indicate an efficiency problem with the cats. My car is running rich and needs a tune. The hi-flow cats can't handle the rich condition. I just delete the codes when they appear and wait for the next time. Hopefully the tune will solve the problem.
Burning Brakes
Joined: Jan 2006
Posts: 1,170
Likes: 27
From: Magnolia Greens NC
Originally Posted by Garry Stettenbenz
i recently had some codes come up on my vette and afgter 2 weeks in gthe shop I got it back and they said all codes have been erased. I should drive it for awhile before I get it smoged. Took it back to the shop and it would not pass smog due to no check engine light. Drove the car about 2 miles and what do you know the check engine light came on showing codes 420 and 430. I returned it to the shop saying they have to tune the car to remove these codes.
Could someone give me a some advice before they have the car another week and $500.00 to $1,000.00 later.
Thanks,
Frustrated corvette owner
Could someone give me a some advice before they have the car another week and $500.00 to $1,000.00 later.
Thanks,
Frustrated corvette owner
Pro
Joined: Nov 2004
Posts: 743
Likes: 1
From: Bartlett IL
I would make sure your tune shop knows how to use the software. I use HP Tuners and I diabled the rear o2 sensors from throwing any codes. A few weeks later I had the emmisions test done and passed. no problems. If they dissable the check engine light all together it will fail, also if they just disable the codes from turning on the light it will fail. The codes will still be there, even if the lights not on. You have to dissable the rear o2 codes entirely. Good luck 
