Civic EG

What's up everyone!

I have a 94 civic vx with a USDM 95 GSR OBD-1 swap. So i recently did a headgasket change due to loss of coolant, thank god nothing blew up But now i have a cel 41 which is primary oxygen sensor - heater. Only time i get the code is when i start up the car. What i did so far:

-Change the o2 sensor. (didn't work, there goes my $100)
-Rewired anything that was necessary for the vx model.
-Reset the ECU and took off the
-Bled the coolant system
-Checked fuse 15.

That's about it. My last option will be checking the wires for a short but i wanted to know if there's any other things i should try to do before finding this hidden short. Thanks!

vx came with a 5 wire o2 sensor. gsr came with a 4-wire. did you convert to 4-wire or are you still using the 5-wire?

(cali vx may have came with a 4-wire, can someone confirm?)

yes my vx came with a 4 wire. I didn't even have to convert the o2 Sensor

Is it possible that one of the o2 wires got pulled/pinched during the hg change?

probably, i need to get me a multimeter asap. I'll look more into it but do you have any suggestions as to what i should look for as well? thanks teal_dx!

I'd do a visual inspection of the wires as far back into the harness as you can. But yeah, multimeter would be best bet.

Found it! What sucks is that, i had to take out the whole harness and make sure every other wire was still good But it was cut literally right next to the passenger shock sensors.

Sucks but at least it's a cheap fix. Guess you have a spare backup o2 sensor now