2002 Mercury Sable Q&A

2002 Mercury Sable Question: how many o2 sensors does a 2002 mecury sable have

how many o2 sensors does a mercury sable has and when it says lean bank 2 which sensor is that? thanks all -
Answer 1
it has four but i dont rec replacing o2 sensor it can be a vacuum leak most common problem i rec a diag for this code -