Hello, first time posting , I have a 1990 accord auto tranny, ok I just did the head about 3 months ago no problems sense , 3 days ago my check engine light came on so I pulled the codes and I had 1 oxygen sensor #1 , 15 ignition out put signal and 43 fuel supply system, so i replaced the oxygen sensor and now the check engie light is now staying on , (was not staying on before, It just came on when I was at a constant speed for about 2 or 3 miles) I pulled the codes again and now I have 1,15,41 and 43 so now I wonder if the new oxygen sensor that I got is bad , I know that a 4 wire sensor will help throw falty codes that is why i started at the oxygen sensor. Now it seems that my problem is farther indepth , So now that I have told some of my story mybe someone on here could give me a better insite on where to start testing
Thanks for any help Misty

 

1 O2 Sensor Circuit

15 Ignition Output --- Electrical Problem in Circuit

41 O2 Sensor Heater --- Problem with O2 Sensor Circuit

43 Fuel Supply --- Problem with O2 Sensor Circuit or Fuel Supply Circuit

So i would check your o2 sensor once again...for 3/4 of your problems that seems to be it...also check the Main Fuel Relay as well

 

OK I know where the relay is but now is there a easy way to get to it , and once i get there is there a way to test a relay I have never known of a way to test a relay, I layed down under the steering colum and there is alot of relays down there how will i know i got the right one i will pull the so called new o2 sensors and take it back to the parts store, and get another I will put it in tomarrow so that i can use the lift at work. I'm not crawling around in the 26 degree weather. but i have to say thank you very much, I have had both vehicles brake down all in the last 5 days so as soon as i fix one , the other brakes down ( well lets just say not safe to drive ) I hope that i figure this one out. anyone else have anymore dirctions to go in also?
thanks Misty

 

I would change the o2 sensor first and see if that makes the code 43 go away..because its a 2 part problem with a code 43..so change the obvious and then see what happens

The only way i know how to check the Main Fuel Relay is to put the key into the II position and if you here a faint click its bad.

 

Leaveing to go to the parts store now we will see i will try to check back in tomarrow I have to work a double shift so i will try that.
Thanks again Misty

 

No Problem

 

No that's the fuel pump.

The test can be found by searching, along with a ton other main fuel relay stuff.

 

May still apply

 

I just got back to the computer after about 2 weeks. Been very busy, but anyway I have changed the O2 again and that took away 3 of the codes so I did a little more searching, I called the Honda dealership and was tell'm about code 15 , he asked me a few questions and then an odd one , do I have a bad motor mount , well yes I did , I new I did! I have had this car only for about 8 months so I'm still getting all of the previous owners kinks worked out of it , it turns out on auto trannys that they have a vacuum controlled rear motor mount. So I had it changed and all of the codes are gone. I still don't understand how vacuum works with a input signal but whatever!
Well there is my up date thanks for helping a girl like me out.
If I need help again I will turn back to the second option of the guys on here
( P.S. Yes I do most of my own work, this time I had no way to support the engine, LOL) Thanks again Misty