The MIL on my 95 civic dx has been on for a couple months now. Last night I checked the connector and it threw my a CEL code. The code is "41 Primary oxygen sensor heater".

Is this something I can fix myself? If I take it to a repair shop how much am I looking to spend?

 

You need to replace the oxygen sensor.

Buy an NTK, Denso, or OE honda sensor - DO NOT BUY BOSCH OR ANY OTHER BRAND! AND NEVER BUY ONE THAT HAS TO BE WIRED UP! BUY DIRECT PLUG-IN SENSORS!



Anyways in your car I believe the sensor is located in the exhaust manifold up front and is pretty easily accessable through the engine bay - no need to jack the car up. (This is if you still have the stock exhaust manifold.)

It's fairly easy to replce as long as the sensor isn't seized up in there. Go buy a $10.00 o2 sensor removal socket from your local auto parts store - it will come in handy. It's a socket with a slot on the side to allow the wires to stick through it and not get damaged.

Once you swap the sensor out pull the ECU fuse or disconnect the negative battery cable for a few minutes to reset the check engine code.

 

Great thanks for the help.

I think this one here has direct plug in sensors. Can anyone verify this?

http://cgi.ebay.com/ebaymotors...ZWDVW


Modified by Blammo300 at 12:25 PM 12/8/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blammo300 &raquo;</TD></TR><TR><TD CLASS="quote">Great thanks for the help.

I think this one here has direct plug in sensors. Can anyone verify this?

http://cgi.ebay.com/ebaymotors...ZWDVW


Modified by Blammo300 at 12:16 PM 12/8/2005</TD></TR></TABLE>

Bingo!

Denso First time fit are great.

 

Thanks again, I will place the order today.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">You need to replace the oxygen sensor.</TD></TR></TABLE>

Before you go crazy, test the curcuit first.






<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">Buy an NTK, Denso, or OE honda sensor - DO NOT BUY BOSCH OR ANY OTHER BRAND! AND NEVER BUY ONE THAT HAS TO BE WIRED UP! BUY DIRECT PLUG-IN SENSORS!

</TD></TR></TABLE>

Cheap sensors suck!!!

 

Good idea Kenny, but I knew the only options for the flowchart were:

1. Replace sensor

2. Replace ECU

3. Repair wiring



It's still a good idea to double check if you've got the equipment to measure the voltages, etc.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">Good idea Kenny, but I knew the only options for the flowchart were:

1. Replace sensor

2. Replace ECU

3. Repair wiring



It's still a good idea to double check if you've got the equipment to measure the voltages, etc.</TD></TR></TABLE>

Thanks Tom

More and more hondas are getting modded, thus people hack harnesses. I am starting to see at my shop.

 

Who ARE these stupid ***** that CUT wires? i got a set of brake calipers, and the ****** hardlines were cut, the brake hoses were cut, and the ABS sensor wire was cut from the knuckle. Who is so stupid they'd cut wires rather than unplugging them? Who I ask you?

Also, I too will reccomend ONLY Honda OEM O2 sensors, as other brands tend to not work the same, and your ECU will not like them. Hard to explain, but this is one of the few parts for your car in which you ONLY want an OEM part.

 

i don't see anything wrong with cutting wires when it's needed.. i had to cut wires on my O2 because the O2 I got had shorter wires..

you speak like it's never okay to cut wires and nothing is set in stone my friend... it depends on the circumstances

 

btw, before you get a new O2 sensor, i'd check the wiring and make sure it's good... it could be that the wiring on the heater came loose and that's why you're getting that code

if the O2 is to blame, then yes, you will have to purchase a new one