Eco - Bank 2 Sensor 1 Location?
#3
Boost :)
If one of those front sensors goes out, the other isn't far behind. Do yourself a favor and replace both of them. They are wideband sensors and are much more sensitive than a standard one. Sensor 1 is always pre-cat sensor. When it comes to O2's, I always just replace both sides to ensure they both are working well.
#6
Access
on both sides, sensor 1 is accessible through the wheel well towards the cab after the headers, sensor 2 is near the transmission bell housing under the truck and pokes through aluminum heat shielding on top of the second CAT on each side (2001 F-150 4.6L V8)
#7
Senior Member
have to have O2 sensor tool and they hard to break loose. Harbor Freight has a cheap one. I bought a Bosch replacement from Rock Auto, seems some on here don't like them. Mine work fine for 35k miles and then sold the truck, so don't know how long it would last.