originally put in tech section........I took out my oem intake pipe a while ago, and the cel light happened to pop on, thinking this was the sensor that hooked onto the pipe, I didnt think much of it....I just installed a cai on my car, and when I unhooked the battery to reset the ecu, the light went off....then came back on......my friend told me about checking the code by myself...which i did....the light blinked once..... meaning...."Open or short in O2 sensor circuit, defective Primary O2 sensor" WHAT DOES THIS MEAN? Do i need a new o2 sensor? Im open to all comments and suggestion...thanks guys....

 

pull the ecu fuse for like 10 mins..then put it in and let it idle for like 10 mins and it should fix it...

 

Just did what you told me to....same thing is happening...........whats goin on...hmmmmm......anybody else.?

 

just installed a new sensor.....cel code stayed on after resetting the ECU/ dc the battery.....what do I do now? all the wires look good......my car was idling like crazy today....car died 4 times today when I was rolling up to a red light.....does anybody know how much a primary o2 sensor would cost at the dealership?

 

I got a bosch replacement sensor with the plug for $90. What motor do you have? It sounds more like a Idle Air Control valve to me.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by USDMDC2 &raquo;</TD></TR><TR><TD CLASS="quote">pull the ecu fuse for like 10 mins..then put it in and let it idle for like 10 mins and it should fix it...</TD></TR></TABLE>


doing that wont fix ****. it'll jus reset the ecu and soon after the light will come back on. since you jus
resetted the ecu and didnt FIX the problem. if one blink means the o2 sensor check the connections
and the sensor then you go on from there. it'll be either connect the wires or new sensor.

 

do u have an ek.? check connections. is there an secondary o2 , check that.. mine did that once.. was not the o2 though.. i had a crack in the header causing it to go off. they sell o2 sensor at kreagen for 25..or pep boys.. ask moe

 

I bought a bosch one and thats the one I installed. The wire seems a little short so I had to yank on it a little to connect it.

 

Where is the secondary sensor exactly?

 

Its a d16y7

 

correct me if i am wrong, but i believe the secondary 02 is screwed into the cat-converter..careful streatching ur wires, just undo the electrical tape then streatch it..

 

The secondary is at the rear of the cat. Did you have to splice the wires to connect the new one or did the one you bought have a plug on it? I've tried both on various Civics and the ones that I had to wire always gave me trouble.

 

try replacing the o2 sensor with your friend's working one. that way you know it works.