A6 CEL Secondary Air System

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A6 CEL Secondary Air System - 6/5/2006 2:05:49 AM    Wcc44   Posts: 16 Joined: 4/30/2006 Status: offline Hey guys, I know this appears to be common and there are many posts about this on the forums, but my question hasn't really been addressed. I am getting a CEL that reads Secondary Air Injection Flow Incorrect (or similar). The local German Master Tech shop told me that I have buildup somewhere inside something up in my heads, and that to fix it, they will have to take off the heads and everything and that it would be like 16 hours of labor at 79 bucks an hour, not including parts. I have read on the forums that the most common cause of this problem is exhaust leakage into the secondary air pump.... is this true? Does the shop know what they are talking about or are they just trying to screw me? I am a college student and cannot afford 1600 bucks. Post #: 1

RE: A6 CEL Secondary Air System - 6/5/2006 5:22:09 AM    techbod Posts: 12715 Joined: 11/4/2005 Status: offline never heard so much rubbish in my life (somethings blocked in the AIR system and you have to remove both heads to clean it out), they are really taking the Peeeeee now get the codes and post them here its probably something very simple and they are trying to take your eyes out and the sockets at the same time _____________________________ Dave UK member (in reply to Wcc44) Post #: 2

RE: A6 CEL Secondary Air System - 6/7/2006 8:56:48 AM    Wcc44   Posts: 16 Joined: 4/30/2006 Status: offline 16795 - Secondary Air Injection System: Incorrect Flow Detected P0411 - 35-10 --- Intermittent (in reply to techbod) Post #: 3

RE: A6 CEL Secondary Air System - 6/11/2006 10:08:22 AM    dankhound   Posts: 2634 Joined: 10/17/2005 Status: offline More likely than not the combi valves on the back of the head are starting to get clogged with carbon. Usuallly removing them and cleaning them will fix the problem. This of course is assuming the pump is operating properly and the valves and their control circuit are opening and there is no leakage in the system. (in reply to Wcc44) Post #: 4

RE: A6 CEL Secondary Air System - 12/6/2007 7:44:26 PM    Speede   Posts: 2 Joined: 8/14/2007 Status: offline I too am getting the SAI fault codes now that winter is here...my CEL reset during the summer.  The SAI Pump runs on a cold start, and I've traced the vacuum lines and Air Injection hoses.  All are tight with no leaks.  I did notice that there is no backpressure at the Pump output port.  Is this normal? I'm down to trying to trouble shoot the combi-valves or the pump.  Where should I start? (in reply to dankhound) Post #: 5

RE: A6 CEL Secondary Air System - 12/7/2007 11:21:05 AM    NH_USA Posts: 732 Joined: 9/16/2004 Status: online I get a P0411 CEL on my 97 Audi every few weeks. (reset with VagCom) Since it dosen't return quickly I am looking a either a semi blocked line or one that leaks. _____________________________ 1997 A6 Avant 1998 Jetta 2007 Dodge Grand Caravan SXT one High Performance Roller Skate (in reply to Speede) Post #: 6

RE: A6 CEL Secondary Air System - 12/7/2007 11:25:51 AM    techbod Posts: 12715 Joined: 11/4/2005 Status: offline its an air line/vacuum problem and probably a break in the AIR system hoses _____________________________ Dave UK member (in reply to NH_USA) Post #: 7

RE: A6 CEL Secondary Air System - 2/10/2008 6:01:59 PM    VW01AUDI00 Posts: 387 Joined: 8/1/2006 From: Conneticut Status: online If I've fixed air line problems with the P0411 trouble code, Would the ECU reset it self when the problem is fixed or do you you have to clear the codes for the service light to go off? I think its a clogged combination value. < Message edited by VW01AUDI00 -- 4/6/2008 3:45:38 PM > _____________________________ (in reply to techbod) Post #: 8

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