O2 sensor shorted out? help! CEL light on.?

I have a honda crv 03, 2nd gen.


77k mileage





The other week, after I started the engine, the "Check Engine Light" lights on.


It started like normal. I didn't feel any trouble with it, but I know that may ecm/pcm detected a problem.


I checked the engine oil and it seems to be low. So I brought it to a shop and let them perform an oil change. I thought that this could be the problem why the CEL is on.


The car was lifted with a complete hydraulic lift, and I was able to check the under part of the car.


At first, I was checking the chassis and suspension of my CRV. While walking beneath, I saw my O2 or the Heated Oxygen Sensor (HO2S) sensor wire, stripped!


AND YES, exactly, this is the cause of CEL on. I'm pretty sure.





We have a puppy here in our house, who is always playing, running, sleeping around our parking.


And the fact that he likes to bite and chew anything that he saw and liked, or hanging.





My honda crv O2 sensor looks like this:


http://www.innerauto.com/includes/images/Inner_Auto/Honda_Parts/honda_oxygen_sensor.jpg





it has a 4 wires;


1 black and 1 grey - which I read from an automotive book that it is for the heating of the sensor.


2 whites - wire sending the signal to the ECU or ECM or PCM or ECM/PCM


- The 2 whites were extremely stripped apart, and the moment I saw these wires were intertwined. Which I suspect to cause an short circuit (I'm not sure)


- The other 2 (black and grey) are still okay.





I removed the O2 sensor.


I get an environmental splice from a electronics store and connected the 2 white wires.


I thought that this will solve the problem, but the CEL light is still on.





-I remove that negative for 15 mns. CEL on


-I remove the positive for 15 mns. CEL on


-I remove the positive and negative. CEL on


-I remove the fuse under the hood. CEL on


-I remove the fuse inside the car. CEL on





I don't know what to do.


I am planning to bring it to a shop with a ecm/pcm diagnostic tool.


But I'm sure that they will be giving me an o2 sensor problem here, and cost me bucks just for that simple **** scanning. If only I just have that scanner. sheesh..





Any advice there? Thanks. I will really appreciate.


And oh. I am also aware of removing the negative or positive overnight.


But I don't really believe on it. Honda's ecm/pcm are very intelligent and can detect immediately a new part connected.


But still, if you will advice me to do it for a good reason. I will. Thanks :)


Please help me. Help me from those Auto Mechanics who will cost me money just for this little job.





Please use simple terms in explaining :)


I am just a 19 yr old, aeronautical engineering and aircraft maintenance student.


thanks|||to a point you are right. it is a heated o2 sensor and the 4 wires can lead you into a nightmare of a problem if you sit and guess. at the same time, you are guessing as to why the light is on. the stripped wire may not be it at all. a loose gas cap can trigger that light quickly also with no change to the driving. some shops will pull codes for free with the idea that you would go to them for parts. if the o2 sensor is the issue, replace it and have the light reset at that shop. they can do it with the same scanner.|||i agree buy a code reader and u will know for sure|||Jeez guy, quit whining and buy a code reader for $30. Then you'll stop guessing and stop throwing parts at the problem. Read the post below





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