I'm getting ticked off that my CEL keeps popping up about 30 mins. of driving and especially when gunning it. Not to mention the annoying code 20 - ELD. I've already replaced the primary oxygen sensor 3 times 2 with denso units and 1 bosch. this is a 4 wire.

my setup is as follows
b16a2 swap, no catalytic converter, welded a flex pipe to join the downpipe and b pipe, running obd1 p30 ecu via obd2a-obd1 jumper harness.

could not having a cat be the problem??? what other things do i check for?

 

Is the wiring harness stock or did you do anything to it...like lengthen it?

 

i'm not too sure,my friend did the wiring. is there any way to check if the wiring is bad? I have a multimeter, what should i check for?

 

ttt...

 

well if you fix code 1 dont expect 20 to go away..

 

i really don't care about code 20, just need to get rid of this damn code 1. any other ideas guys??

 

you sure its code 1 and not ten, i made that simple mistake and replaced my o2 wen it was just a bad IAT sensor

 

i'm pretty sure, because when i get my CEL my car would hesitate.

 

yea cause i thought wen i check my code it flashed once, but it was a paused blink which means ten and not a quick blink which is one

check your wiring maybe one of the grounds is not grounding?

 

the grounds are fine, one to the tranny and one to the cylinder head. would a bad ground cause that o2 sensor problem????

 

no the grounds for the sensor

i belive power,signal,two grounds on the sensor

 

so do I use a multi-meter? and test each black wire to the battery (-) side? sorry to sound like such a noob!

 

test ligh, power the lead wire then backprobe the wires to check for ground!

 

Sounds like a wiring problem. Double check it!!