The oxygen sensor, if defective, will give inaccurate readings to the engine management computer and may lead to a rough idle.
Yes
oxygen sensor
Need a little more information. there are a number of reasons why your cougar would run rough. Anywhere from the mass oxygen sensor to the idle control sensor, oxygen sensors and on and on.
yes but will run a little rough
Not likely but possible. I would suspect a leaking vacuum hose.
Bad oxygen sensor
A 2003 Mercury 115 that runs rough at a low rpm might be having a problem with the MAP Sensor or the Oxygen Sensor. The MAP Sensor is going to be the easiest one to replace because it is usually located plugged into the EFI (Electronic Fuel Injector), a fancy would for carburetor.
One of the reasons for a 2003 Nissan Sentra to run rough and stall out when it comes to stop is a bad oxygen sensor. Another cause for the running rough could also be a dirty air cleaner.
I have 1998 a Lincoln town car with the same problem.. It idles rough when you start, then smooths out once it warms up and you give it gas. From what I am reading its either an oxygen sensor or you have vacume leak in one of your hoses by the manifold.
check oxygen sensor or map snesor, they are notorious for going out!
The Right Front ABS wheel speed sensor is also used as a rough road sensor to assist the knock sensor in dectecting weather there is a knock from engine or bump from the road in order to adjust the spark and fuel.
If the 1993 Mercury Villager runs rough when the check engine light comes on and the code reader says 34 and 51, there is a problem with an oxygen sensor and the MAP (Manifold Absolute Pressure) sensor. Both parts together will cost around $200.