O2 Sensor Did It
Thread Starter
Senior Member
True Car Nut
Joined: Jan 2004
Posts: 4,328
Likes: 1
From: Lakeville, MN
O2 Sensor Did It
After replacing the o2 sensor I have gone from 12mpg city/ 15 highway to 19mpg city/ 29 highway. 
The old O2 didn't look so bad but it smelled like oil. I think before I replaced my PCV the oil burning may have damaged it, huh?
The old O2 didn't look so bad but it smelled like oil. I think before I replaced my PCV the oil burning may have damaged it, huh?
Senior Member
True Car Nut
Joined: Jun 2003
Posts: 7,270
Likes: 465
From: Las Cruces, NM
Re: O2 Sensor Did It
Originally Posted by fantastic88
After replacing the o2 sensor I have gone from 12mpg city/ 15 highway to 19mpg city/ 29 highway. The old O2 didn't look so bad but it smelled like oil. I think before I replaced my PCV the oil burning may have damaged it, huh?
The old O2 didn't look so bad but it smelled like oil. I think before I replaced my PCV the oil burning may have damaged it, huh?
, after 115k, i'd say so.
DINOSAURUS BOOSTUS
Expert Gearhead
Joined: Mar 2005
Posts: 41,391
Likes: 30
From: Enfield, CT
As with any electronic or mechanical piece, some wear better than others. No one can really say what is working good/bad w/o putting an O2 onto a scan tool and watching it flip flop. Even then..what'* really good and whats bad?
I guess you'd need to record the data and over analyse it to a point that putting in a new one if you felt the need would be best.
I guess you'd need to record the data and over analyse it to a point that putting in a new one if you felt the need would be best.
Senior Member
True Car Nut
Joined: Feb 2003
Posts: 3,684
Likes: 0
Originally Posted by daman
Originally Posted by sonoma_zr2
I'm at 218k w/ original
Senior Member
Posts like a Camaro
Joined: Sep 2003
Posts: 1,025
Likes: 6
From: Bad Axe,MI.
I,m just going by my own experience, i just changed mine yesterday(143k, and i noticed on my scan tool(cp9145) it was showing inconsistencies(staying on rich longer than lean instead of cycleing evenly between the two), a sighn of a bad O2 senser. so if mine at 143k is bad i'd bet one at 200k is't much better. 
