O2 sensor problem

[lawnscapes2]

I started my truck up and all of a sudden i heard a rattle under the cab. I crawled under there only to find my o2 sensor b4 the cat was rattling. I replaced it with bosch replacement. No problems since

 

But i was wondering what causes an o2 sensor to look like this?

 

any ideas?

 

thanks,

Matt

 

 

 

[Bish]

Looks like you were running a little rich. Other than that, it looks pretty much like mine did after 80K.

[lawnscapes2]

Well i do have 150000 miles on it. But it wasnt throwing any codes, the only reason i knew to change it was the rattle.

 

I just wasnt sure if there was something that was overly wrong with the old one that i need to worry about or something that was making it like that.

 

I am not sure if that is just how they are supposed to lookwhen they are finished or not ?

[svensk]

I have an O2 that threw a code a few weeks ago. Father in-law and I cleared it and I was going to replace but never got around to it. And now its working fine and hasn't tripped anything since.

[asilverblazer]

Do I remeber a TSB out on rattling O2 sensors?

[Bish]

On a side note, I replaced mine because my mileage had dropped by about 2 mpg over a year+. I knew because I keep a spreadsheet with every tankfull and all maintenance. They were not setting a code but I think they get "lazy" before they set codes. When I replaced the front 2, my mileage immediately went back up. I changed them at about 80K and again at 170K when I replaced the Y-pipe due to cats rattling from rust. I only replaced the front 2 as the rear ones are only there to confirm the cats are working and they have no effect on A/F mixture.

[zibzer]

hey bud, looks like mine in my sonoma. Im new to the "fullsize world" but I had my o2 sensor in the sonoma replaced with a bosch. 2 years later it went bad again. I talked to the mechanic and he said that Bosch and GM dont mix very well in some circumstances. I can vouch for that statement though because i changed the spark plugs with bosch platinums and they only lasted 3 months before the electrode blew on one of the plugs. so just be careful when replacing parts with bosch.

[J45p3r]

hey bud, looks like mine in my sonoma. Im new to the "fullsize world" but I had my o2 sensor in the sonoma replaced with a bosch. 2 years later it went bad again. I talked to the mechanic and he said that Bosch and GM dont mix very well in some circumstances. I can vouch for that statement though because i changed the spark plugs with bosch platinums and they only lasted 3 months before the electrode blew on one of the plugs. so just be careful when replacing parts with bosch.

 

<{POST_SNAPBACK}>

 

 

Those Bosch plugs are crap (IMO), but I've only heard good things about their O2 sensors.