I believe it is located on the exhaust, just before the cytalatic converter, which would be under the truck on the passenger side. Look for what looks kind of like a spark plug sticking out of the Y-pipe just before it connects to the converter. It will have a thin wire coming from the end of it. .
Actually it is before the firewall on the driver side of the engine in the exhaust manifold. You'll be able to reach down next to the oil fill tube and reach it from the engine compartment. It is difficult to reach from below the truck.
The first answer is correct for a 1995 Chevy S10 4x4 with a 4.3 ltr engine. i have one and that is where it is located on mine. need a pipe wrench or adjustable wrench to take it out.
The check engine light would come on.
Where is oxygen sensor on 4.3 liter 1995 Chevy S10. All O2 sensors are threaded into the exhaust system at various points, and you probably have more than one sensor.
2.2l is behind cat converter
It's a code for the oxygen sensor.
what is the wiring diagram for the o2 sensor on 2000 s10 blazer. it has 4 wires. what what do they all do /
The temp sensor for the ECM (engine control module) is next to the thermostat housing.
That vehicle has several oxygen sensors and they are all threaded into the exhaust at various points.
Bank 1 sensor 3 would be the O2 sensor after the catalytic converter.
Downstream ... This is after the Catalyst Converter.
The 1994 S10 uses a MAP sensor, not a MAF sensor. We need to know size engine you have in that S10.
it should be located on the front exaust pipe before the cat converter.