tips on replacing O2 sensors.

[DZink24]

my '98 Neon has just shy of 100k, and i have notice a significant drop in mileage, decreased performance, and the CEL is on, so i hooked it to the diagnostic computer, O2 codes came back. i bought both O2 sensors today from NAPA, i will likely change them this weekend. ive got the haynes manual, but obviously, real world tips are much more useful! thanks!

 

[BHanna]

I'm not too familiar with the Neon but if there's no room to get a wrench in there, you can find a special socket with a piece cut out to fit over the wiring pigtail.

Hopefully the factory put anti-seize on it or it may be tough to get out. If it doesn't want to move, you can try penetrating lube or a torch to heat up the fitting (but I wouldn't try both at the same time).

 

[DZink24]

thank you. i planned on having a small propane torch handy to heat up the metal around the old sensor. i am guessing if the factory did make a mistake and put anti-seize on the originals:-laf it is no longer any good after 12 new york winters. . i have some to put on the new ones, although i highly doubt the car will be around long enough to see another O2 sensor change!