I'm not a mechanic but looking at the engine wiring schematics , for 1991 and 1992 models , I only see ONE heated oxygen sensor. ( which happens to have a 15 amp fuse in location # 18 of the fuse panel ) it is referred to as an upstream o2 sensor. I'm not sure exactly where it is located, but it is threaded into the exhaust pipe close to the engine or one of the exhaust manifolds.
That would depend on what year of Ford Explorer and which engine you have ( my 1995 Ford Explorer with the 4.0 liter OHV , V6 engine has ( 2 oxygen sensors )
On a 1995 Ford Explorer : There are ( 2 ) oxygen sensors ( I believe there is one sensor in the outlet of each exhaust manifold )
there are 4 o2 sensors
My Chilton repair manual - engine wiring schematic shows ( 2 ) heated oxygen sensors for the 1993 Ford Explorer
According to my Haynes Explorer Repair Manual : A 1997 Ford Explorer , 5.0 liter V8 engine has ( a total of 4 oxygen sensors )
how many o2 sensors on a ford e350 van 2003
My 1995 Ford Explorer with 4.0 L OHV has 2 oxygen sensors (Helpfull)
There are 2 oxygen sensors.
A 2001 Ford Explorer Sport , with the 4.0 liter Single Over Head Cam V6 engine should have ( 4 oxygen sensors )
It has ( one oxygen sensor ) on the 1991 and 1992 Ford Explorers
There are many sensors on that vehicle. Need to know which ones you are looking for.
i believe four,before and after the cat converters
My 1995 Ford Explorer has ( 2 ) and depending on the year anywhere from ( 1 to 4 ) and it also depends if you have the 4.0 liter OHV or SOHC engine
( two ) I believe they are in the outlets of the two exhaust manifolds
( 2 sensors ) - # 6 fuse - 15 amp - HEGO sensors ( in the fuse panel in the drivers end of the dash )
Oxygen sensors are located in the exhaust manifolds & in front pipes, should have 4
4 ======================================================= The above answer is correct if you have the 5.0 liter V8 engine in your 1996 Ford Explorer , but if you have the 4.0 liter EFI , V6 engine ( VIN " X " ) there are ( 3 oxygen sensors )
According to my Haynes repair manual : For a 1997 Ford Explorer , 4.0 liter Single Over Head Cam , V6 engine : The engine wiring schematic shows ( 4 ) oxygen sensors
( 2 ) They would be close to the engine , either near the ends of the exhaust manifolds or in the exhaust pipes
The 1992 Ford Taurus has two oxygen (O2) sensors. Both O2 sensors are located upstream of the catalytic converter with one on each exhaust bank.
On a 1998 Ford Explorer XLT : With the 4.0 liter SOHC V6 engine ( 4 oxygen sensors , the 2 closest to the engine are used for adjusting the fuel ratio and the other 2 are catalyst monitors There are also ( 4 oxygen sensors if you have the 5.0 liter V8 engine )
On a 1998 Ford Explorer Sport : If it has the 4.0 litre EFI engine ( which is an over head valve / pushrod design engine / the 8th character of the VIN is an " X " ) there are ( 3 oxygen sensors ) If it has the 4.0 litre SOHC engine ( the 8th character of the VIN is an " E " ) there are ( 4 oxygen sensors )