It depends on the make, but most likely a malfunction of the egr temperature sensor.
It means a manufacturere specific code. That's it.
That is the first time I have heard the term auxiliary emissions control, a vehicle only ever has one emissions control system. Could you provide an obd trouble code so a proper diagnosis can be given
Photochemical smog is caused by the mixing of hydrocarbons and NOx in the presence of sunlight. Smog may be controlled by: * Controlling industrial emissions of the precursors * Reducing automobile emissions by reducing traffic or increasing pollution control
The answer varies by model and manufacturer. I had an 84 Buick Park Avenue with a computer controlled carburetor that someone told me was the first computer controlled GM, but I would doubt this was the first computer controlled emissions system. As far as I know, computer controlled emissions did not become federally mandated until 1996 when OBD II emissions systems became standard. Now we have a light that comes on making little old ladies pay $50+ for a mechanic to tell her she forget to tighten her gas cap, thanks uncle sam.
egr valve
You're going to have to be more specific with your question. There are many components to the emissions control system.
There is no such thing on this car.
Answering "What emissions control device on a car lowers carbon monoxide content?"
no the fuel pump it self does not control emissions
To control emissions a cupola may be fitted with a cap that is designed to pull the gases into a device to cool the gases and remove particulate matter
Emissions.
because your emissions need controlling, pretty basic stuff here