92 vx w/cel code 1

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thepartsguy

New Member
Just did a d16z6 swap into a civic vx and i'm running a stock p28. I got a code 1 after i drove for about 5 minutes, I cleared up the code and tried it again. The 02 sensor is brand new, so i know it's not that. My friend let me borrow his p28 and i drove it for a good half hour and no CEL came on.

I want to know if anyone has ran into this problem?
Does code 1 mean 02 and/or bad ECU?
Is it the ECU?
Are there different p28's?
Are there different 4 wire 02 sensors?
Or did i get scammed on the ECU i bought?
Is there any way to find out how to re-assure myself that the ecu is bad?
I don't want to ask for a refund untill i'm a 100% sure it's the ECU?

Any help/opinion is appreciated!
THANKS
 
primary 02 sensor is code 1. if its not a honda 02 sometimes they just dont work. and if your using the vx harness it has a 5 wire 02 the p28 needs a 4 wire 02
 
primary 02 sensor is code 1. if its not a honda 02 sometimes they just dont work. and if your using the vx harness it has a 5 wire 02 the p28 needs a 4 wire 02


Well it's an aftermarket 02 sensor, but what do you think about the other ecu working fine and this ecu throwing the code 1?
 
how many wires is your o2 sensor
 
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