They are screwed into the exaust system at various points. Some people say that there are 4 oxygen sensors, but technically, that is not correct. Only the front 2 are considered oxygen sensors. They are screwed into the exaust pipe, one on each bank, after the exaust manifold, but before the catalytic converter. Sometimes they are screwed directly into the exaust manfold itself. The other 2 are actually called catalyst moniters. They are oxygen sensors, but they serve a different purpose. They moniter the activities of the catalytic converters, thus the name, catalyst moniters. They are screwed into the exaust one on each bank,after, or downstream, of the catalytic converters. A 7/8ths inch wrench is the size needed to turn the O2 sensors. They just unscrew out normally. The connectors on the front O2's will be a challenge. They are way up behind the engine in a really stupid place to get access and unplug/plug in.
How do you change gear oil in a 1998 expedition?"
The O2 sensors are located on the exhaust of the vehicle. The first O2 sensor will be located beyond the manifold and before the catalytic converter, then there is typically one or more beyond the catalytic converter. to change them you have to unplug the wire at the connecter (generally about 6" from sensor) then simply unscrew them with a wrench out of the exhaust pipe. they may come out hard from repeatedly being heated and cooled.
if your looking for the front abs sensors thay are located in the hubs, and would have to remove front tire, brakes,caliper, and rotor to remove.
There are usually two separate speeds sensors on a 1998 Dodge Ram. One is located on the rear of the automatic and one is located on the front of the automatic.
The oxygen sensors on a 1998 Chevrolet S10 are changed by disconnecting the lead wire and unscrewing them from the exhaust manifold. New sensors are then screwed into place and the wires reattached.
All oxygen sensors are located in the exhaust system.
I noticed that " Helpfull " had answered that the air suspension relay on a 1998 Ford Expedition was located on a bracket by the passenger side headlight . ( he came up with the answer after doing a Google search about 21 hours ago - was the answer not correct ? )
( 6 quarts ) with engine oil filter change ( according to the 1998 Ford Expedition Owner Guide )
a 1998 car will have (2) 02 sensors per bank. In other words, a v6 or v8 will have a total of 4 sensors and a 4 cyl. will have 2 sensors. One is located before the catalytic converter and one is after or behind the cat.
The oil filter on a 1998 Ford Expedition 5.4 Triton engine is located just behind the bumper on the drivers side. Im not sure of the answer above for on my 98 expedition (5.4) the oil filter is located on the engine(drivers side), nothing near the bumper.
In the fuse panel located below and to the left of the steering wheel by the brake pedal , in location # 1 - 15 amp - flasher relay ( according to the 1998 Expedition owners manual )
normally they are located on the exhaust. you may have three. on the manifold and on the exhaust pipe itself...
The fuse that controls the fuel pump, on your 1998 Ford expedition, is located in the fuse box in the engine compartment. A diagram outlining each fuse is located on the inside of the fuse box cover.
6 quarts with engine oil filter change
O2 sensors are always located on the exhaust system.
Should be somewhere in the front bumper or behind it.
I believe there are 2 oxygen sensors that are used for air / fuel ratio and 2 oxygen sensors that are downstream from the catalytic converters and are called catalyst monitors
On my 1998 Ford Expedition XLT , There are 4 Oxygen sensors. 1 each in front of the Cats. and 1 each behing the cat. for a total of 4 Oxygen Sensors.
under the front bumper on drivers side
On my 1998 Ford Expedition XLT. The oil filter was located on the drivers side behind or near the front bumper.
On a 1997 or 1998 Ford Expedition ( 5W-30 ) * with engine oil filter change , 5.7 liters / 6.0 U.S. quarts
The oxygen sensors on all vehicles are uasually located before and after the catalitic converter to monitor your emisions ! Good Luck !