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My car is throwing the p0420 code. The discription is catalyst balance inefficiency. I thought it was the catalytic converter so I replaced that but the light is still on. Any ideas for what might be wrong?
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Re: Service Engine Light
did you reset the code?
how long have you been driving around with the new cat?
Abbott long tubes,homemade true duals,slp ram air,whisper lid,eibach springs,kyb shocks,BMR subframe connectors, BMR LCA reloc brackets,BMR LCAs. T-top/manual converted -
Re: Service Engine Light
I reset the code right before I replaced the cat and the light was off for about 2.5 weeks, and it just turned on yesterday again.Comment
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Re: Service Engine Light
same here did u mess with the intakeComment
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Re: Service Engine Light
No i havent messed with the intake but I put a set of headers on about two months ago and the egr was leaking for a long time. I got it to stop leaking but could that be the reason?Comment
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Re: Service Engine Light
If there's an exhaust leak it could be causing your o2 sensors to read that the cat isn't working right...Y87 Package
MANUAL CONVERTED, Pro 5.0 Shifter
Pacesetters, Magnaflow Cat, Cutout, Flowmaster
MOGOB APPROVED!
BONE APPROVED!
VANBIBBER APPROVED!
KRISTEN APPROVED!
Vice Prez.
Team Black...TEAM EMO
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Come on kids! Get a Calendar!Comment
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Re: Service Engine Light
Ok I'll try seeing if it's the EGR starting to leak again. Any other ideas?Comment
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Re: Service Engine Light
did u put a stock cat on or an aftermarket?
-Y87
Lid,K&N Filter,PaceSetter Headers,Magnaflow Cat 2.5in S-pipe,Flomaster :(,3.42 LSDComment
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Re: Service Engine Light
If it was the EGR I'm pretty sure it'd be throwing a different code.
TEAM C6V6Comment
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Re: Service Engine Light
I put on an after market one. Its a magnaflow highflow cat. I got it from zzpreformance.com so I'm pretty sure its the right one.Comment
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Re: Service Engine Light
Highflow cats will set the SES light in most cases. You'll need a sim or tune it out with HP tuners. A sim is cheaper by like 450 but I'd advise getting HP tuners if you plan on doing any further modding.
TEAM C6V6Comment
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Re: Service Engine Light
I have a magnaflow and i have not ever had the SES problem
weird....
-Y87
Lid,K&N Filter,PaceSetter Headers,Magnaflow Cat 2.5in S-pipe,Flomaster :(,3.42 LSDComment
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Re: Service Engine Light
Yeah like I said, most cases.
TEAM C6V6Comment
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Re: Service Engine Light
I have 3" Borla cat back with Pacesetters headers and a Magnaflow 3" high flow cat & 3" S pipe with no SES light. I think it has to do with where you put the O2 sensor in the pipe behind the cat.sigpic
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Re: Service Engine Light
how far back did you put yours?Y87 Package
MANUAL CONVERTED, Pro 5.0 Shifter
Pacesetters, Magnaflow Cat, Cutout, Flowmaster
MOGOB APPROVED!
BONE APPROVED!
VANBIBBER APPROVED!
KRISTEN APPROVED!
Vice Prez.
Team Black...TEAM EMO
sigpic
Come on kids! Get a Calendar!Comment
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