I have a 1990 cadillac sevilleand when I check the trouble codes it comes up with a E049 current. I looked all over on the internet but I cannot find this code anywhere. Does anyone know what this code means?
Code E049 is an Air Management System Problem. This diagnostic test monitors the AIR system to detect operating problems with the Electric Divert Valve (EDV) and Electric Switching Valve (ESV). It performs these tests using the oxygen sensor and ECM integrator function to monitor valve function.
Basically the computer has detected a malfunction in the EDV, the ESV or the wiring. A leaking injector may also cause this code to set.
I have a 1990 cadillac sevilleand when I check the trouble codes it comes up with a E049 current. I looked all over on the internet but I cannot find this code anywhere. Does anyone know what this code means?
Code E049 is an Air Management System Problem. This diagnostic test monitors the AIR system to detect operating problems with the Electric Divert Valve (EDV) and Electric Switching Valve (ESV). It performs these tests using the oxygen sensor and ECM integrator function to monitor valve function.
Basically the computer has detected a malfunction in the EDV, the ESV or the wiring. A leaking injector may also cause this code to set.
Are you seeing any odd behavior with your car? I have this same code right now and am trying to figure out how to get rid of it. Please read the middle of the following thread to hear about my 90 Deville's problems. Maybe we can figure this out together.
Think disconnected Air pump and you'll know why so many older cars show this code. It's a favorite of many older car owners (disconnecting or removing the air pump).
Think disconnected Air pump and you'll know why so many older cars show this code. It's a favorite of many older car owners (disconnecting or removing the air pump).
Are you implying that we should disconnect the air pump or are you implying that it sometimes becomes accidently disconnected? Humor me and explain a bit
If I had a buck for everytime I've either found one removed/disconnected on a car, or heard someone talk about how they were taking it off because:
1. It's for emissions only and the car doesn't really need it.
2. I can pick-up like 10hp by disconnecting/removing it.
Etc, etc, etc.
If that's NOT the case here, I'd suggest checking that it IS still on the car and functioning.
my 1990 eldorado with a 4.5 v8 is all of the sudden running terrible, it up until now has been perfect! Its running super rich and idling very rough and the exhaust seems to be chugging..anyone know what these two codes mean (primarily if they are about my problem?) and what can I do to stop this problem! Does it sound like maybe I have a bad spark plug or something (I was thinking that) It feels like the car is only running on 6-7 cylinders all of the sudden, will it hurt my car to continue to drive it like this until I can get it repaired? Thanks in advance for any replies! =)
I have a 1990 cadillac sevilleand when I check the trouble codes it comes up with a E049 current. I looked all over on the internet but I cannot find this code anywhere. Does anyone know what this code means?
Hi, I have a 1990 Seville also, and the same code, it comes on after
idling for a long period, such as in heavy traffic, and if I reset it goes away.
Did you find the fix?
Regards
Guy
I am also having the same problem on my 90 Seville. Trouble Code E049 CURRENT. It is idling rough, doesn't have power climbing hills, smells rich, and sounds like running on 6-7 cyls. I am going to replace plugs tomorrow. I tried clearing the code and it comes right back.
I recently replaced my air pump so I know it is connected. Is it possible that hoses could be swapped? Does removing the pump help economy/power at all?
Did anyone ever figure out how to get rid of this code? My car no longer idles roughly, but I do get this code if I sit in stopped/slow traffic for an extended amount of time or after I exit the highway and drive slower in residential neighborhoods.
i have e048 and e049 current! 
