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Kevin
Kevin, Technician
Category: Audi
Satisfied Customers: 1774
Experience:  Diagnostic technician vw/ audi specialist
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2004 audi a4 quattro-I cant get it through emssions. The

Customer Question

2004 audi a4 quattro-I cant get it through emssions. The evap system and secondary air system is "not ready". Thought it was a miles thing but I have put over 1,000 miles on it since this started almost a month ago. No codes in computer except "brake booster". Please help.
Submitted: 13 days ago.
Category: Audi
Expert:  Kevin replied 13 days ago.

Hi im kevin whats the actual fault code you have ?

Customer: replied 13 days ago.
The only fault code is for "brake booster", I do not know the actual code because I do not have the car here in front of me. You dont think this would keep the evap system and secondary air system from being "ready" do you?
Expert:  Kevin replied 13 days ago.

Brake boost is run off vac system so this could confuse the system into not resetting evap system

Customer: replied 13 days ago.
Okay...but i thought the "brake booster" is a mechanical part no?
Expert:  Kevin replied 13 days ago.

Brake booster is a large diapram run from intake vacumme.that uses the vacumme from intake to multiply the braking force.this fault code will need to be sorted

Customer: replied 13 days ago.
Would it be the "check valve" or sensor thats on the booster?
Expert:  Kevin replied 13 days ago.

Its more likely the pressure sensor .the actual code will be needed to confirm this

Customer: replied 13 days ago.
I'll get that for you and get back to you soon.
Expert:  Kevin replied 13 days ago.

Ok perfect

Customer: replied 13 days ago.
Code related to booster..
17887=P1479
18232
18227
Expert:  Kevin replied 13 days ago.

This would point toward a booster vac pump failure .this will need to be tested with vac gauge

Customer: replied 13 days ago.
Take a look at this pic a d tell me if this is the part please.
Expert:  Kevin replied 13 days ago.

Thats the one

Customer: replied 13 days ago.
if it turns out that this unit is defective this woukd keep the evap and secondary air system from being "ready"?
Expert:  Kevin replied 13 days ago.

This is highly possible this needs to be fixed to get car through test anyway

Customer: replied 12 days ago.
I called the dealer and I got the part number here's the part number that they gave me (8E0-927-317-H) the one they gave me has an H at the end but I'm also finding that same part number without the H can you tell me the difference between the two please
Expert:  Kevin replied 12 days ago.

The later the leter the newer the nart for instance is it ended with an a originally .everytime the part is improved the letter gets higher

Expert:  Kevin replied 11 days ago.

Please remember to rate my service and let me know if you need anything else at all

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