doctorake

96 cx with a JDM B16A swap and was running obd1 p28

I have now swapped in a p2t with a jumper for obd2a so it plugs right in.

I am getting these codes

P1259 - Vtec, I know that I need to wire it out of the p28 and back into the stock harness. Easily done I can find the diagram of which pin is for which wire.

P0135 - O2 primary sensor. I have a JDM header and did not see a bung to wire one into? Is this correct? Where would it normally wire into? My car is going to the shop to get a cat wired in anyways so a bung could be added, I just do not know where.

P1337 - LEET. ok kidding CKP sensor, if I remember this is common on this swap and there are howtos about it

P0141 - O2 secondary. I have a cat I ordered for the 98 EX, it has a bung half way through the cat, is this for the primary or secondary? if it is the primary does the secondary go after the cat then?

P0450 - FPS. Again there are write ups on this, I am sure I can handle it.


Thanks for the help

dSquirrel

so...you only need help with the o2 sensors?
not tryin to be a jerk, just clarifying.

the primary goes before the cat.
secondary goes in the cat.

doctorake

Unless one of those other codes is not at all what I think it is then yes O2 sensors. Any idea on the bung on the stock b16 header? I may have to go look again. Where does the wiring from the O2 goes after the O2 so I can check.

doctorake

and which O2 sensors do I order? 99 ex? 99 si?

Former User

O2 sensor codes - check for a blown 7.5A fuse 15.

dSquirrel

get the ones for the ecu you have.
also, the bung should be near the flange right in front of the cat. if it's not there, drill and tap the pipe, or weld a bung on.