Okay so I pulled a code on my 00 hx and got 4. 3/4 were missfires in cyl 1,3,4 and the other was a 48 (lean air fuel sensor)....my question is where is this sensor, anybody know what could be causing these codes..

 

I've never heard of that sensor - but the problem's probably an O2 sensor.

If you reset the ECU, do the codes come back?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Syndacate &raquo;</TD></TR><TR><TD CLASS="quote">I've never heard of that sensor - but the problem's probably an O2 sensor.

If you reset the ECU, do the codes come back?</TD></TR></TABLE>

where the hell did you pull O2 sensor out of what he just said?

OP, have you done anything to the car? Swap, messed with wires, anything? Did this just start happening out of no where? Sounds like you need a tuneup. When is the last time you changed plugs and wires, distributor cap? If its been awhile, change all that out. Also, there might be a O-ring seal around the spark plugs. I dont know if that model year engine had the same problem, but the older civic engines would sometimes have those seals go bad, and oil would pool in the spark plug hole, and then the oil seeps into the comb. chamber, and wets the plug, and causes missfire.

Bottom line, a tuneup wouldnt hurt

 

well I got my dc headers put on about a couple months ago which deleted my cat so the check enjine light has been on for the secondary O2 sensor, then I started misfiring so I got a cat put the O2 sensor in and reset the ECU, now the codes im getting are the misfires in cyl 1,3, and 4 and the lean air fuel sensor which was code 48. Since finding out this I have replaced plugs, wires, cap and rotor and am at a loss....and the codes do keep coming back......thanks for the replys.

the only mods I have other than suspension is DC 4-2-1 headers, magnaflow high flow cat, 2.25 full cat back, and a SRI.....its a stock engine (d16y5)....thx

 

Okay just went to auto zone and im getting a code P1162 which I beleive is my primary O2 sensor (correct me if im wrong) . If im correct this is putting my car in limp mode which is causing my car to run lean......when I put my headers in I (like a dumbass) spliced my O2 sensor to reach......anybody know any fixes...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sol2hatch &raquo;</TD></TR><TR><TD CLASS="quote">

where the hell did you pull O2 sensor out of what he just said?

OP, have you done anything to the car? Swap, messed with wires, anything? Did this just start happening out of no where? Sounds like you need a tuneup. When is the last time you changed plugs and wires, distributor cap? If its been awhile, change all that out. Also, there might be a O-ring seal around the spark plugs. I dont know if that model year engine had the same problem, but the older civic engines would sometimes have those seals go bad, and oil would pool in the spark plug hole, and then the oil seeps into the comb. chamber, and wets the plug, and causes missfire.

Bottom line, a tuneup wouldnt hurt </TD></TR></TABLE>

O2 sensor will cause it to run lean and mis-fire.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackouthx &raquo;</TD></TR><TR><TD CLASS="quote">Okay just went to auto zone and im getting a code P1162 which I beleive is my primary O2 sensor (correct me if im wrong) . If im correct this is putting my car in limp mode which is causing my car to run lean......when I put my headers in I (like a dumbass) spliced my O2 sensor to reach......anybody know any fixes...</TD></TR></TABLE>

- I'd say it's likely that's what it is.

It's happened to me before, O2 sensor was the fix. Though I changed both, so I'm not sure which one the fix was on.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackouthx &raquo;</TD></TR><TR><TD CLASS="quote">Okay just went to auto zone and im getting a code P1162 which I beleive is my primary O2 sensor (correct me if im wrong) . If im correct this is putting my car in limp mode which is causing my car to run lean......when I put my headers in I (like a dumbass) spliced my O2 sensor to reach......anybody know any fixes...</TD></TR></TABLE>

I doubt it's throwing you into limp mode, and if it does go into limp mode it should richen it up so you have a lower chance of tossing a rod, not lean it out.

Check the wires going to that secondary O2.

 

A failed/disconnected/out of range primary O2 sensor will default the PCM's fuel trims to their maximum values, so the car will still run, but run very rich.

P1162 is the primary oxygen sensor, and for you is a 7-wire O2, 5 signal wires, and 2 heater wires. It's a linear air/fuel sensor, and aids the PCM in lean-burn mode when cruising. (operates very similar to a wideband)

Secondary O2 will not cause an engine to misfire, only to cause the PCM to fail the catalyst monitor, and throw a code P0420 and a corresponding code for the second O2 sensor if it is not hooked up.

Might want to check the contacts in the distributor, water leaking past the gasket will cause that problem. Also check the plug wire connection to the cap, water tends to get in there and turn them green with corrosion.

The sensor should be located towards the top of the stock exhaust manifold, these models had the cat up front in the engine bay. Make sure that these wires, if you did extend them, are soldered or else your sensor could be quite a bit off, since it does not produce much voltage.

 

im pretty sure its the primary O2 sensor that is at fault, I did not solder the wires when splicing so im gonna remove it and solder it and see if it helps because this is a 300-400 dollar O2 sensor....is there any special solder I should us and any particular way to splice it....I thought my car was running rich because I could smell the feul big time but then I got the code 48 which made me think it was running lean.....Ill update once done thanks for the input guys...

 

oh and should my primary sensor have 7 wires cause it only has 5..

 

I would use 99% tin 1% copper rosin core solder, you can find it at walmart or radioshack, should be 1mm in diameter or less.

When you solder them twist the pairs together so that you don't have that stupid fold that most people do when wiring. put some shrink tape on one end of it so when the solder is complete, you can shrink wrap it.

Kinda like this:

XXXXXX------XXXXXX

twist them together so it looks like that, and feed solder through it until it is a solid bundle, you want to see as little of the original copper as humanly possible, this will prevent corrosion, and also maintains a straighter wire with no bulk hanging off.


EDIT: the Honda service manual has 5 signal wires and 2 heater wires, so yes, seven total, Here is a pic for your car:

 

^^^^you guys are awesome for all the helpfull advise, rep.....what guage/type of electrical wire would be best for this kind of splicing...thanks

 

I would use 16 gauge if you can get your hands on it, 12 will work, but the more copper (or the heavier the gauge) the more resistance, which translates to a lower output voltage.

 

okay cool so Ill go get some 16 guage and let you know how it turns out.....thx