Please Help

[Sk8ter05]

dang it, my cel just came back on yesterday. i don't know why. i drove about 1,000 miles on it before it came back.

 

[99 ProLX]

drove 75 miles no CEL ...

*crossing fingers*

 

[red95_240sx]

its prolly gone

 

[99 ProLX]

CEL came back on after about 100 miles after installing the non-fouler....

Ran the code came as the P0421 "Warm up Catalyst Below Threshold"


...pissed

 

[00protegeracer]

what could be the problem if my cel doesnt go out. its been cleared like 5 times already and it always comes back on. cant remember the code but it says that the voltage is low, but i just got a new battery, spark plugs, spark pllug wires, and coils.

 

[Joost27]

find out the code again, voltage too low, could be on many things, the exact code would help more.

99ProLX, I think it's weird it came back, Did you drill out both of the non-foulers? if so then thats the problem. If you only did one, then It is really puzzling.

 

[red95_240sx]

**** the protege's CEL...

 

[99 ProLX]

find out the code again, voltage too low, could be on many things, the exact code would help more.

99ProLX, I think it's weird it came back, Did you drill out both of the non-foulers? if so then thats the problem. If you only did one, then It is really puzzling.

No I drilled out only one and did everything else correct... I don't know.

 

[Sk8ter05]

I haven't scan my car for any codes yet but the CEL just turned off last night. i know for sure it'd come back. and dam i just got a letter that i have to get my car smog check. does anyone know if my car will pass with my headers on, and my intake or do i have to swap all of it out back to stock?

 

[99 ProLX]

i just got my car inspected today, passed with a header and cat-back exhaust and intake

 

[Sk8ter05]

really, dam, i think i should just go ahead and try to see if it passes the first time. and if not then i'll just have to take it all off or something.

 

[red95_240sx]

00 ProLX what intake did u get?

 

[99 ProLX]

the Simota