so i was pissed the other day when i was doin my oil change cuz a while back i went to jiffy lube and they use oil filters that i cant get off. it had been on there thru like 3 different oil changes and i also just switched to synthetic so i figured it was time to replace it. so in all my fury i took it off by drilling holes all the way thru it and shoving a screw driver thru it to get some torque on that fucker.
i guess i didnt really think about the consequences... when i was done a noticed i had gotten some oil all over everything in that general area (including where the upstream o2 sensor is connected) when i turned the car on the check engine light came on almost immediately which i figured was most likely an electrical failure somewhere. pulled the code and got 65 (secondary oxygen sensor heater circuit malfunction)
it would be easier to diagnose the problem but the oil change isnt the only thing i did while i was under the car. i thought i heard the exhaust leaking from somwhere so i decided to seal both sensor ports with exhaust sealant. not only does the exhaust still sound like its leaking (thinkin now its comin from the flex pipe) but i cant get the upstream sensor out... im a fuckin genius in case u cant tell. i tried everything to get the bastard out cuz i thought some sealant might have gotten into the sensor or clogged one or more of the holes but it wont budge. the bolt started to strip so i gave up on that.
i also wasnt really sure which sensor it was tlaking about so i took out the back one too. i recently installed an MIL eliminator and thought that could be the problem but i rewired everything and used shit loads of electrical tape just to be safe. the light is still on tho and the other thing is that the eliminator had already been in for about 2 weeks before the oil change disaster and seemed to be working perfectly. i actually noticed a difference in power (im guessing cuz the ecu thought the exhaust was cleaner and allowed more fuel into the mixture) unfortunately all i have are guesses cuz i really didnt even work on cars till like 2 months ago when i put on a new header, muffler, and did some custom exhaust piping.
the last thing i checked was the coating on all of the wiring around the oil filter... everything on the o2 sensor wires seemed fine but seeing that i cant get the sensor out i couldnt get a good look. one thought is that oil might have gotten into the wiring harness it connects to. ..
there was one other set of green wires and orange striped black wires there that just looked like they attach to a piece of metal coming out of the frame. so im thinking those are grounding wires and arent really a big deal but i couldnt get that out for a closer look either cuz the other end seems to go all the way to the ecu. if someone could give me some advice on where to go next id appreciate it. duno if anyone will actually take the time to read all of this but bein a complete noob with cars isnt helping me. seems like my approach to learning (fucking with things till i break them then trying to fix it) isnt really working as well as it did with computers

 

Yeah i bent my fuel line last weekend but its no big deal......Um i would take it in from now on and get the oil changed.....Replace the O2 sensor and see what happens....If you have an exhaust leak take it to a muffler place.

 

it sounds like you have a mess you need to prioritize things your wiring sounds like a mess make sure all your ground wires are hooked up. You probably have a bad O2 sensor it's not your fault w/ the oil in the connector that won't do anything or the oil on it you already messed up your O2 sensor by striping it so try to fix the mil eliminator remember the mil eliminator won't fix bad 02 sensors and your ground wire problem clear the code see if it still comes up if it does it's time for a new 02 sensor you stripped the bolt so now u can't use a wrench or 02 sensor socket so what u have to do is
A. take a vice grip get it real tight and put it around the bolt and turn it counterclock wise.
B. get a punch not the one w/ a round end the one with a sharp straight screwdriver like end and it w/ a hammer counterclockwise.
C. take it to a shop w/ a torch and they'll take a vice grip to it and get it out in lk 5 minutes but you're going to have to cough up at least 30 maybe even 60 cuz most shops charge 60 to put an 02 sensor in
now after that your check engine light should be fixed then go ahead with the exhaust leak if the exhaust leak is b4 the 02 sensor it might cause a CEL to come on to so if u go through all that and it don't work try and fix the exhaust
it sounds like you're new to cars its ok we all were at one time u have to mess up somewhere and learn somewhere too but go through everything you did with the exhaust check the flange see if that is on correctly make sure when you tighten the flange that you go back and forth with the two bolts not just one bolt at a time make sure they're equal i messed up a couple times doing that the custom exhaust is probably were the leak is at so while the car is running feel around for air exiting before the muffler thats where the exhaust leak is at then fix accordingly long posts take long answers i got nothing else to do in college all day (homework):hsdunno: so it is cool to put up long posts.

 

soak the o2 in pb blaster for 20 min. ive read in honda tsb's that oil can contaminate the sensor if it is spilled on it. but i think you just need to use some penetrating oil. if that doesnt work take the torch to it and heat it up. im assuming you are junking that o2 so dont worry about fuckin the wires up with the torch. last resort is cut out that section of pipe and replace it with a new peice that has an 02 bung pre-welded in it

 

i actualy got the first sensor out yesterday with vice grips and a hammer... its just kinda hard cuz i only have ramps and i have about 6 inches between me and the underbody with which to work...

did some testing switching around the sensors and pulling the CEL code and ive limited the problem to being somewhere between the rear sensor and the first wiring harness it connects to... pretty sure its just a bad o2 sensor...

do i have the buy a sensor specifically for behind the cat? what i want to do is buy a new one and put it where the primary sensor is since that ones old and put the mil eliminator on the old one and move it to behind the cat... since the eliminator is giving the ecu false voltages anyways im thinking it wont make a difference if the sensor is old... as long as it works

 

the two sensors are DIFFERENT, and i think they are different part numbers. if they are the same part number then you will be alright. so if you are going to swap make sure they are the same part number. i dont think they are