I did a search but couldn't find much about it. I just got my resonator changed out since it had a hole along the seam of it making my car sound like a hot rod.

I took it into an small garage exhaust shop and they put in an aftermarket resonator section. Now there's a ground wire hanging. Is there any need for the ground wire on the resonator? Is it for the O2 sensors? Will leaving it unhooked cause any damage?

 

the ground should be attached to your catalytic heat sheild, and yes I believe it is to ground the 02 sensors. My ground wire got ripped off, then my car threw a Cat code.

 

I don't know how long mine had been off b4 I found it. It had no ill effects while it was off.

 

Most of the time ground straps are there just to prevent interference In the radio and other electronic devices . I have never had any issues removing mine.

 

Mine is attached to a cat flange bolt......

 

This just happened to me. Did you reconnect yours yet? the bolts on mine are pretty much untouchable(brittle) I think maybe i will try to solder it?

 

Make a bond strip or use a large gage wire....it probably gives your ECU more accurate O2 sensor readings.....

 

Somehow I doubt that, since the exhaust is bolted to the engine and the engine has, (or @ least should have), a solid ground.

 

I just checked under my car last night when I was doing my oil change.
I dont even see it.
I have a warpspeed y pipe and a test pipe... No issues at all without this ground strap.

 

i would put the ground back.i know i did because if you think about it there is alot of rust and gaskets in the exhaust system and you really may need that extra ground besides Nissan didnt just put it there for no reason.i replaced mine with a braided ground strap from pepboys it looks just like the OE one on there except its of a heavier gauge.

 

Mine when rolling down some road got caught on something and ripped of I was like Wtf is that pulled over looked under the car and saw it was ripped off......

 

Mine got ripped off a couple years ago. No codes or any decreased performance. Still getting 25 mpg on the highway.

 

Thanks guys. That flange bolt is rusted to crap. Guess i will have to cut it out.

 

Mine is hanging and hitting the actual ground and has been since I got the car lol.

 

So it's a true ground strap!

 

lol yup!

 

if you've got rusty bolts on your exhaust, chances are your complete circuit is compromised. You need a complete circuit for that last O2 sensor to not give a faulty reading...NISSAN knew best to put one there.

Mine needs to be replaced...so I'm going to make a couple new ones right now just to have a few extra...being lowered this has been ripped of twice, lol!

 

If I was going to make my own could I use copper wire? Like say 8/10 awg? and should i use crimp on terminals or soldered?
I could get copper wire an crimp on terminal ends from work thats why I ask.

 

As a few said here, I also had the grounding strap hanging, and my max threw a Cat code. I got rid of that code with a new grounding strap. Since then, almost one year after, no more P0420.

IMHO it's important for the ground reference of the O2 sensors.

About using bare copper wire + terminals, I'd say yes, that should work just fine. But I'm a little concerned of it getting rusted...

 

 

+2

 

I believe those rear sensors have four wires. Two are for the heater, one is for the lambda signal, and one is for signal ground. The ground strap that is running from the bottom of the body to the resonator should be redundant, and primarily there to prevent the exhaust from having a voltage other than ground. Should it be there? Probably, as it was part of the original design. Is it entirely necessary? Probably not.