The oxygen sensor is a part of your emissions control system that allows your
engine to perform at its best while producing as few emissions as possible. If
you're driving a Fiat manufactured after 1980, your vehicle has an oxygen sensor.
Every vehicle has a specific oxygen to fuel ratio that is considered perfect for
optimal performance. Your Fiat oxygen sensor helps to keep this ratio in check
by sending the information to your engine's computer. If you've got too much
air in the ratio, you've got a lean air mixture. If you have too little air in
the ratio, it's called a rich mixture. Either way, when your Ferrari oxygen sensor
is working properly it will catch these imbalanced ratios and send the data to
the engine computer. The engine's computer will then make adjustments to the
fuel output so that the mixture is balanced once again. A broken oxygen sensor
can result in hesitation, surging, poor acceleration, emissions test failure,
and poor engine performance.