What is Fault code EMISSION (LAMBDA) CONTROL

[wls318ti]

Does any one know about the fault code Emission (lambda) Control? What does it mean? What causes fault? How to fix? Could it mean I have leaky Fuel injector and car is running rich and cause rough idle? Could it mean that ICV is bad? Or the O2 primary is bad? Or could it be a mixture of all? WHAT THE F**K IS "EMISSION (lambda) CONTROL

[JNCoulombe]

The O2 sensor is called a lambda sensor so it probably refers to the oxygen sensor, but there should be a four digit number associated with the trouble code that is more informative.