answersLogoWhite

0

O2 sensors, or oxygen sensors, on a 2001 Mercury Sable are devices that monitor the level of oxygen in the exhaust gases, helping the engine control module (ECM) adjust the air-fuel mixture for optimal combustion. There are typically two types of O2 sensors in this vehicle: upstream (pre-catalytic converter) and downstream (post-catalytic converter). Proper functioning of these sensors is crucial for maintaining fuel efficiency, reducing emissions, and ensuring the vehicle runs smoothly. If they fail, they can trigger the check engine light and lead to poor engine performance.

User Avatar

AnswerBot

2w ago

What else can I help you with?