Question about engine code

I am getting a engine code 45...Rich exhaust indication - oxygen sensor voltage stays high after one minute of engine run.

Thats the code i been getting. THe thing is the code doesnt come on after a minute of running the car...It only comes on when I stop at a light for an extended period of time and then goes right away when i move the car or doesnt come on at all if i sit there and rev the engine to about 2000 the whole time. The light also comes on whent he car has been running non stop for about 30 or 40 minutes. There doesnt seem to be any performace issues when the light comes on.

Lately the engine had been cutting off when I decelerated, it was doing it everytime and then I replaced the EGR valve (carbon almost completely shut off the wholes). Now the car runs a lot better but the engine light still comes on and it may cut off one time a day now and its not that big of a deal.  Sometimes the RPMs drop down to almost 0 and about cuts off then it jumps backs up to 1000 or so and it doesnt cut off.

What could be wrong, could it be a MAP senor or IAC sensor or the guy at autozone suggested a possible vacuum hose leak and suggested that i spray them with carb cleaner and see if there are any holes in them while the engine is running but I checked the vacuum hoses that i could find but not any behind the engine or further down near the fuel lines.

I took out the MAP senor and it was filthy so I cleaned it. By the way my car is a 93 saturn SL2.

also could it be a faulty PCV valve? I came across a page that was talking about it and checked autozone and it is 2.99 and on autozone it says replacing the PCV valve can help engine idle/fuel economy.

By the way my car as 142000 miles on it.

Code 45 sets not just because the engine has ran for one minute, but because the ECM has been receiving a steady rich indication from the O2 sensor for a one-minute period of engine running.
You are going to have to look for reasons that are causing the over fueling. Things like a dirty, leaking or defective injector, excessively high fuel pressures from a defective regulator, clogged air filter and yes like you said a bad MAP sensor.
Maybe check the vacuum line to the Map a leaking or plugged vacuum line, may cause the ECM to think that the engine is under heavy load and pour in the fuel.
Dan.

how do u check for bad injector?

You could start by having the injectors professionally cleaned, don?t waste your money on the stuff you pour into the tank. It?s more so meant to be a preventative maintenance item and would not be strong enough to clean a fouled injector.
As for testing them you could measure the resistance of each injector coil with an ohmmeter the values would depend on what engine you have.
An injector balance test you would need a few specialty tool as in a pressure gauge and an injector pulsater so you could pulse each injector for a specific amount of time and measure the amount of pressure loss.
You also have to be careful doing a balance test not to flood the engine with fuel.
Dan.

so thats basically something for a mechanic to do...

I was checking the vacuum line from the fuel pressure regulator and i pulled it off and smelled it and it smelled like gas...is this normal or could i have a bad fuel pressure regulator? Do the rubber eelbow connectors on the vacuum lines fail a lot? There are two elbows that I have in question....One from the PCV and one from the fuel pressure regulator, they both have a white spot on the top, i dont know if its corroded or what but I sprayed it with carb cleaner with the engine running and didnt look like air was leaking. Would it be wise to replace the elbow joints or the whole vacuum line just to be safe?

I think i am gonna run up to autozone and see what they say after testing it...

well nevermind they cant test below 96....back to trying to figure this out by my self lol

If you have fuel in the vacuum hose to the pressure regulator the diaphragm in the regulator has ruptured. Remove the vacuum hose from the regulator and have an assistant pressurize the fuel system by cycling the ignition key on and off several times, DO NOT start the car. Check for any fuel from the pressure regulator vacuum nipple. If fuel is leaking from the nipple replace the fuel pressure regulator.

The PCV elbows on these are very prone to developing leaks, if the elbow has any soft spots or you suspect it may begin leaking in the future it should be replaced.

I replaced the PCV valve but no difference...I didnt replace the PCV Grommel b/c i didnt know which one I needed when I was at Autozone. I guess I beter check the fuel regulator pressure tomorrow.

I couldnt just find elbow connectors for the vacuum valves at autozne, do they come sperate or do you have to buy a  vacuum line also...i guess i will check out advance auto for that.