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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 02-14-2013, 11:07 AM
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diggyd357 diggyd357 is offline
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OMG !!! Now Im lost...HELP !!!!

I had a code for secondary air pump incorrect flow....So I changed the valve. That code disappeared, but now I have 2 new codes P1423 & P1421 (secondary air system banks 1.& 2). So what.does that mean ?

I also had 2 other codes that are still there...P0133 & P0428 (O2 sensor and catalytic converter)
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Old 02-14-2013, 11:18 AM
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Fudman Fudman is offline
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It most likely means changing the valve did not fix the problem. What was the original code that made you decide to replace the check valve? While the valve is often the problem, a failed valve usually leads to pump failure. Does your pump activate for 90 seconds on a cold start? If yes, then your vacuum line (which activates the check valve) is likely compromised. The rubber tubing sections which connects the valve to the plastic pipe degrades due to it's location (above the exhaust manifold). If it is moved, like when replacing the valve, it will crack causing the valve to get insufficient vacuum to open. Check and replace the vacuum hose first.
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Old 02-14-2013, 11:33 AM
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diggyd357 diggyd357 is offline
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The pump runs fine in the morning and the hose is brand new..... I should've mentioned that. Changing the pump deleted one code ,but.added 2.new ones...that's what threw me.
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Old 02-14-2013, 12:29 PM
mhobryan mhobryan is offline
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If your pump is working, you have a new valve that is properly snugged up and your vac line has been replaced, I would clear the codes and see if they come back... more than likely your O2 and catalytic converter will come back if you didn't do anything to rectify.
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Old 02-14-2013, 12:33 PM
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diggyd357 diggyd357 is offline
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Quote:
Originally Posted by mhobryan View Post
If your pump is working, you have a new valve that is properly snugged up and your vac line has been replaced, I would clear the codes and see if they come back... more than likely your O2 and catalytic converter will come back if you didn't do anything to rectify.
It's like you were watching lol.... I did just that not 15 minutes ago. See where this goes...
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Old 02-14-2013, 02:39 PM
poolman poolman is online now
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You have a vacuum leak somewhere you need to address--would suggest that you look at the vacuum hose that leads from the backside of the intake to the valve you replaced--check around back there and there are a couple of hoses that can cause problems--hope that helps
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Old 02-15-2013, 07:57 PM
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diggyd357 diggyd357 is offline
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How long on average does it take for the cel to come back on (if it is) cuz its been 2 days and no cel....am I in the clear ???
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Old 02-16-2013, 02:44 PM
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540iman 540iman is offline
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Check hose leading from pump to valve. They can easily get hole worn in them. Check connection of hase at valve. You'll get it!
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