Cel Problems

[egb20hatch]

hey, whats up guys. I got my swap in about a month ago and my cel came on the other day. so i pulled the code and it was 41 primary oxygen sensor- heater. what do u think would cause this code to come up. a loose wire, i don't know how that would be possible cause i soldered them, but any help would be nice. thanx

 

[sirkurtius]

did the swap engine come with 2 O2 sensors?
did you wire both O2 sensors together as to make 1 signal?
did put the primary o2 sensor on a aftermarket header [down below wear the header meeds the cat?
need more info to find problem

 

[egb20hatch]

it's an obd1 motor with one o2 sensor located near the cat on the exhaust manifold. it runs fine just keeps throwing that code(41). I drove all they way to work today and the cel didn't even come on untill i raced this itr and all of a sudden my vtec went out. so when i got home i pulled the code and its giving me code 21(vtec soleniod valve) and code 41. what do you think i need to do to fix these problems. thanx for ur help.

 

[sirkurtius]

as for your vtec solinoid code, check your oil level if its low and your beat on the engine it might sense low oil pressure and cause a code.
do a oil change and use the recomended 5w-30 oil
as for your o2 sesnor u say it only came on when u raced, the problem may be the o2 sensor has a slow response to engine speed changes, which means u are probably burning lean. see if can swap one from a friends car that u now is good and try that, of it works then replace it, i know they are not cheap , so try to get one from a friend or reckers first.

 

[egb20hatch]

I'll have try try that. thanks for ur help