Yes, it certainly COULD be the O2 sensor, but the only way to know for certain is to use a diagnostic code scanner. You can borrow, rent or buy one at many of the auto parts retailers. Using a code scanner lets you know for certain what computer codes are being stored.
The carburetor on a 1998 Ford Escort with a V4 engine is located next to the valve cover. It is on top of the engine.
It's bolted to the engine.
In the Ford Escort LX this particular sensor is typically located in the engine. In particular if you are looking for this sensor it is important that you look on the driver's side of the engine.
Between the engine and transmission ( transaxle )
I believe it is located in the fuel tank.
A 91 engine will not fit in a 98 Escort. The 91 engine is from a generation II Escort whereas a 98 engine is from a generationIII Escort.
The PCV valve on a 1996 Ford Escort 1.9L is located between the engine and the radiator. It is near the vacuum hose.
The timing belt is located inside the timing belt cover at the fron of the engine.
In the fuel line. Trace it from the engine to the tank. LOCATED IN THE ENGINE COMPARTMENT ON THE LOWER LEFT SIDE.
The knock sensor is on the side of the Escort engine block. It is located close to the oil sensor.
They are on the sides of the engine block.
The 1995 Ford Escort OBD connection is located on the right hand side of the engine. The OBD connection will be on the air intake manifold.