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Discussion Starter #1
Ok guys, I got in my truck this morning and noticed that my SES light was on. I ran it by Autozone and it was showing 3 codes. Two P0420’s and a P0456 code. Does anybody have any insight to these two codes being thrown together? My truck has 402k miles on it and it still has the original manifolds. Never had a problem with them. The conundrum I’m in is not wanting to drop close to a grand on headers etc on an engine with 402k on it, if that’s the issue. Any ideas?
541609
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Discussion Starter #2
I should also add that I have Cajun B pipes installed as well. So I’m assuming my only two cats left are on my manifolds.
 

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Lmao thanks man.
 

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I work part time at Autozone as the commercial driver... I would have been impressed too at 400K when i did your check engine codes....lol


but it is Texas, and it doesnt take long to rack up the miles.

yes, the only ones left should be on the manifolds
 

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"My truck has 402k miles on it and it still has the original manifolds."

That's 4 or 5 times what most people get. I'd be worried about the cats disintegrating and cat grit getting back sucked into the engine.

"Any ideas? "

The choices are always the same: fix it, sell it or trade it.
 

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Wouldn’t this just be getting two or one new cats put on? No need to take the manifolds off? Is this possible?


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Wouldn’t this just be getting two or one new cats put on? No need to take the manifolds off? Is this possible?


Sent from my iPhone using Tapatalk
OEM cats are integrated with the oem manifolds. Some people have hollowed them out and passed emissions with cats in the b pipes. Not that I'm recommending that unethical, perhaps illegal albeit somewhat economically appealing course of action.
 

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Discussion Starter #9
OEM cats are integrated with the oem manifolds. Some people have hollowed them out and passed emissions with cats in the b pipes. Not that I'm recommending that unethical, perhaps illegal albeit somewhat economically appealing course of action.
Well we don’t have emissions tests where I live. How do you hollow them out exactly?
 

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Discussion Starter #12

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Front cats gutted in situ:

 

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Evap leak states "very small leak" had almost identical wording for mine, and I replaced my Nissan factory has cap with another Nissan OEM part, then no more issues.
 

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Evap leak states "very small leak" had almost identical wording for mine, and I replaced my Nissan factory has cap with another Nissan OEM part, then no more issues.
also check your EVAP purge valve. might be shot or not working 100%. cheap part, 5 minutes to swap out. attached to your charcoal canister above / in front of the left portion of the rear axle
 

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Discussion Starter #17
Well, my SES light hasn’t turned on since Monday. Strange.
 
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