I have a 1995 Honda Civic EX Coupe

I have had a check engine light on for a while now but never thought to check it. Yeah..I know. Well my gas mileage had continued to deplete since I have had the car all the way down to under 20 mpg. Finally I checked the codes via paperclip and got a code 41.

AHhhhh.

Anyway upon looking it up its the 02 sensor heater or whatever. My question is where that is located on my car? Is it the one under the hood next to the dipstick or somewhere else? Also, what is the actually part I need? I see 1, 2, 4 wire ones and different brands. Which is the best?

 

If you reset the ECU, does the code return?

 

Haven't tried. Would that hurt anything to reset it? I've never messed around with the electronic end of my car.

 

Resetting the ECU is as simple as removing a fuse for a few minutes. Click the CEL codes link in my signature.

 

Confirmed. Reset it and same code 41.

 

1994 Honda Civic Faulty Speedometer, CEL for Oxygen Sensor

 

Ohm test the heater element in the O2 sensor:

 

I'll have to go to autozone or somewhere to test it as I don't have the tool needed. At least I know where it is at now. Thanks guys!

If I do need to change it, it is a car specific piece or pretty generic?

 

Who will test the O2 sensor for you besides a mechanic ($$)? Go to Harbor Freight Tools and buy an inexpensive multimeter.

 

If you are looking for replacement parts, check out this thread: https://honda-tech.com/honda-civic-d...civic-3114911/

 

Dude, its thanksgiving, no mechanic is going to be working today.

 

Sears, however, is still open, and will sell you the multimeter so you can do the test yourself. It'll also be a hell of a lot cheaper than paying a shop to do it. This isn't the kind of thing Autozone will do for free.