As soon as i turn the key on i have a code 2 and 22. no need to even start the car. 22 is because i havent ran the vtec wires yet but 2 is suposed to be an O2 sensor code from what i have found. I tryed pluggin in my old one off the b18 same problem. I have a 92 ls no with a b16 2nd gen with a obd1 pr3 computer. i have been told wireing is the same as a p61 or p72 ecu is this correct? why whould i have a turn key o2 sensor problem. tryed 2 different sensors and im useing my old harness. Please help me. thanks JIM

 

This computer/ vechile only has one o2 sensor correct? i dont need to run another or anything correct? also im suprised i have got a code for knock sensor. I havent connected the wire for that or vtec stuff. will it not set a code? will it not affect the way the car runs? thanks jim. once again its OBD-1 pr3 comp. 2nd gen b16

 

bump

 

no one can help?

 

The knock sensor won't throw a code until you crank the car and possibly not until you drive it so that's not abnormal. I'm not personallt familiar with a code 2 at this moment but I'll run a search and get myself up to date. I could be wrong, but I also find it kinda odd that you're throwing a code for an o2 sensor if you haven't cranked up the car.

I know that from my experiance with my P30 ecu that it only needs the one four wire oxygen sensor. The LS one from your 92 should work fine. I'm not so sure about an obd1 PR3, but if it plugged into the harness on your '92 it must be.

I'm going to run a search real quick on code 2 and I'll see if I can help you with some ideas. Damn I miss g2ic right now.

 

According to Hondata, code two is for the secodary oxygen sensor. I can only guess that from my experiance with some obdo PR3 ecu's that maybe your obd1 PR3 has a two sensor setup like the obdo ones do.

If this is the case, which seems likely, you have two viable options:

1. Create a 2 sensor setup that is as identical to the stock setup for your ecu. It will require running extra wires and having bungs welded into your manifold/header for the oxygen sensors. you will also need to find out the correct pairing for the sensors (which exhaust runners they need to monitor).

2. Sell your ecu and get a P30 which requires only one sensor. A lot less wiring and headaches as far as I'm concerned.

This is assuming that the obd1 PR3 (which I am not familiar with). Is set up the same as an obdo PR3.