replacing front oxygen sensors, should I replace rears ?
09-18-2011, 10:02 PM
#1
replacing front oxygen sensors, should I replace rears ? 2002, 59k miles, been getting worse rotten egg smell lately not only when I pull out of garage in the morning but also when backing in after driving for a while. No check engine light, car runs fine more or less.
I will be replacing the fronts with densos.
Is there any reason to also replace the rears?
was planning on getting denso's from napa, does anybody know if there are different part #'s for left and right for denso?
I found 234-4025 and 234-4087 via autozone but napaonline only showed one of those.
I will be replacing the fronts with densos.
Is there any reason to also replace the rears?
was planning on getting denso's from napa, does anybody know if there are different part #'s for left and right for denso?
I found 234-4025 and 234-4087 via autozone but napaonline only showed one of those.
09-19-2011, 12:09 AM
#4
2344025 has longer wires, get those.
They cost ~$35.00 each at Amazon.com and rockauto.com. Maybe cheaper than Napa, definitely cheaper than Autozone.
I wouldn't change any 02 sensors unless you scan it first with the engine running to see if they are switching properly and are working at proper parameters. You might have another issue altogether.
.
They cost ~$35.00 each at Amazon.com and rockauto.com. Maybe cheaper than Napa, definitely cheaper than Autozone.
I wouldn't change any 02 sensors unless you scan it first with the engine running to see if they are switching properly and are working at proper parameters. You might have another issue altogether.
.
09-19-2011, 12:14 AM
#5
Because you have a vacuum leak, thats why you are getting the rotten egg smell. those o2's are fine. If you do replace um please send them to me!
The pcm is dumping extra fuel in to try and make up for the vacuum leak..........find the leak and the smell will go away. Check your intake bolts and PCV hoses.
The pcm is dumping extra fuel in to try and make up for the vacuum leak..........find the leak and the smell will go away. Check your intake bolts and PCV hoses.
Last edited by O2Form; 09-19-2011 at 12:24 AM.
09-19-2011, 06:12 PM
#7
