what is the wiring diagram for the o2 sensor on 2000 s10 blazer. it has 4 wires. what what do they all do /
extended pickup
2.2l is behind cat converter
It's a code for the oxygen sensor.
Bank 1 sensor 3 would be the O2 sensor after the catalytic converter.
That vehicle has several oxygen sensors and they are all threaded into the exhaust at various points.
There is more than one and they are all threaded into the exhaust system at various points.
Downstream ... This is after the Catalyst Converter.
The check engine light would come on.
It has two. They must be replaced, not cleaned.
There is more than one O2 sensor depending on which engine you have. They are all threaded into the exhaust system at various points.
The 1994 S10 uses a MAP sensor, not a MAF sensor. We need to know size engine you have in that S10.