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
Some signs that an oxygen sensor is bad include poor gas mileage, rough idling or stalling, a check engine light illuminating on the dashboard, or a failed emissions test. It is recommended to have the sensor tested by a mechanic to determine if it needs to be replaced.
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.
Replacing the oxygen sensor, also known as the O2 sensor, ensures that your vehicle's engine is running efficiently, improves fuel economy, and reduces harmful emissions. Signs that the oxygen sensor may need replacing include a decrease in gas mileage, rough idling, or a check engine light appearing on your dashboard.
check oxygen sensor or map snesor, they are notorious for going out!