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How many O2 sensors do I have on my truck and where are they located (before or after cats?)? Also, how hard would it be to replace it/them? Thanks in advance!
Well I have a 95 F250HD and I only have been able to find 1 and that was right before the cat. When your under the truck, look up at the tranny and over to your exhaust. They'll be (for me anyways) a line that goes to the pipes, and thats it. Replacing is fairly easy I should assume. Plug and go perhaps? (haven't had to replace mine yet)
Also if been in there awhile I suggest buy an O2 thread chaser to clean up the threads before installing new one. AutoZone caries tool for like $10.00 I believe...
