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Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street
Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
First I must note there are 2 02 sensors per side.
sensor 1 is closest to engine, sensor 2 is behind primary catalytic converter.
Passenger side ( right side) is bank one
o2 sensor 1 bank 2 would be the sensor right under the transmission area. Check its wiring first, as it can come loose and rub on the front drive shaft.