A 2002 Oldsmobile Alero typically has two O2 sensors: one located before the catalytic converter (upstream) and another located after it (downstream). These sensors monitor the oxygen levels in the exhaust gases to help optimize fuel efficiency and reduce emissions. However, configurations can vary depending on the specific engine type and emissions system, so it's always good to check the vehicle's specifications for accuracy.
If you are asking such a question then you ask an adult to do it.
4
4
three
two
2
There are two.
Two.
One
One.
it has three 02 sencers
an o2 sensor is the same as an oxygen sensor. vehicles can have up to 4