1996 Geo Metro EGR valve

Try cleaning it-its cheaper than the EGR valve-who knows you might get lucky. Also if it has a vacuum solenoid check that too-

[quote:8e7f7e297a="rmccabe36"]Engine Mechanical problem
1996 Geo Metro 4 cyl Front Wheel Drive Automatic 90000 miles
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I was told to try cleaning the egr valve with brake cleaner. Should I try cleaning it or just replace it.[/quote:8e7f7e297a]

Okay I tried cleaning it and it didn't work so I replaced it. Now I am still getting the same error code what do I do next?

Now I am still getting the same error code what do I do next? What is the OBD2 code/s?

[quote:e90340797d="rasmataz"]Now I am still getting the same error code what do I do next? What is the OBD2 code/s?[/quote:e90340797d]

P0400 EGR flow

P0400 EGR FLOW MALFUNCTION is a blockage code, not a component failure. What the computer is letting you know is that something is preventing the EGR valve from opening and closing. A sensor mounted just above or near the EGR valve checks pressure to veryify that the EGR valve is indeed doing it's job. When the EGR fails to do it's job, that's when P0400 code surfaces. The typical cause of this code is cracked vacuum hoses or clogged hoses and or components with nasty carbon buildup inside of them. Each and every vacuum line to the EGR system needs to be checked! Carbon clogging also occurs inside the throttle body where the maze of vacuum lines originate. The task of unclogging those holes on the throttle body can become tideous, but needs to be performed in order to open up the vacuum flow. Rarely does a component failue throw a P0400 code, but when it does, it's one of three things. 1) EGR valve diaphragm is cracked and leaking vacuum, 2) The EGR plenumn sensor has failed 3)The amount of voltage getting to the sensor is not enough with a certain window, and will throw a P0400 code.

[quote:735484ea3b="rasmataz"]P0400 EGR FLOW MALFUNCTION is a blockage code, not a component failure. What the computer is letting you know is that something is preventing the EGR valve from opening and closing. A sensor mounted just above or near the EGR valve checks pressure to veryify that the EGR valve is indeed doing it's job. When the EGR fails to do it's job, that's when P0400 code surfaces. The typical cause of this code is cracked vacuum hoses or clogged hoses and or components with nasty carbon buildup inside of them. Each and every vacuum line to the EGR system needs to be checked! Carbon clogging also occurs inside the throttle body where the maze of vacuum lines originate. The task of unclogging those holes on the throttle body can become tideous, but needs to be performed in order to open up the vacuum flow. Rarely does a component failue throw a P0400 code, but when it does, it's one of three things. 1) EGR valve diaphragm is cracked and leaking vacuum, 2) The EGR plenumn sensor has failed 3)The amount of voltage getting to the sensor is not enough with a certain window, and will throw a P0400 code.[/quote:735484ea3b]


wow, I couldnt have asked for a more informative response, this saved me a lotta time, thanks for the wisdom lol <3

[quote:15218e929a="rasmataz"]P0400 EGR FLOW MALFUNCTION is a blockage code, not a component failure. What the computer is letting you know is that something is preventing the EGR valve from opening and closing. A sensor mounted just above or near the EGR valve checks pressure to veryify that the EGR valve is indeed doing it's job. When the EGR fails to do it's job, that's when P0400 code surfaces. The typical cause of this code is cracked vacuum hoses or clogged hoses and or components with nasty carbon buildup inside of them. Each and every vacuum line to the EGR system needs to be checked! Carbon clogging also occurs inside the throttle body where the maze of vacuum lines originate. The task of unclogging those holes on the throttle body can become tideous, but needs to be performed in order to open up the vacuum flow. Rarely does a component failue throw a P0400 code, but when it does, it's one of three things. 1) EGR valve diaphragm is cracked and leaking vacuum, 2) The EGR plenumn sensor has failed 3)The amount of voltage getting to the sensor is not enough with a certain window, and will throw a P0400 code.[/quote:15218e929a]
Okay what do I use Carb cleaner and a small wire brush?

I prefer using solvent-

[quote:c8909e9664="rasmataz"]I prefer using solvent-[/quote:c8909e9664]

Thank you very much for your help. I'll give this a shot this weekend.

[quote:2dc0f31271="rasmataz"]I prefer using solvent-[/quote:2dc0f31271]

i'm getting the same error code, this thread has been really helpful, but I have a stupid question. How do you clean the valve? I get that you use solvent, but where is the EGR valve located? what is the easiest way to remove it to clean it? do i have to clean the hoses as well? i'm sorry to sound stupid, but i just got the car and i know nothing about it.