Audi A4 The Audi A4 model offers nimble handling and performance that makes it one of the leading cars in its class. Read more about the Audi A4 in the Audi A4 review.

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Old 01-18-2012, 12:34 AM
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Join Date: Nov 2011
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where are the replies?
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Old 01-18-2012, 08:35 PM
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Join Date: Nov 2011
Location: Richmond VA
Posts: 18

Originally Posted by njscardino View Post
Ran into a CEL yesterday. Threw a code for P0411 I believe, a blockage in the secondary air pump unit, or something along those lines. Turned out it was the vacuum line going to the combination valve. The line was too short and it was pinching somewhere, causing a blockage. So if any of you run into this and you are able to test all the other components, this may be your cause ....
I've been receiving this same code from a CEL for the past 2 years. I thought it may be just a faulty secondary Air injection system however lately I have been hearing it run after starting the engine up on cold days only to still have the P0411 keep coming back after I erase the CEL this vacuum line that goes to the combination valve..well I cant seem to find it..could you please post up some pics or a better description of where it may be??? Thank you
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Old 03-08-2012, 01:17 PM
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Join Date: Aug 2011
Location: Oklahoma
Posts: 7
Cool 3 different codes :(

My A4 has had multiple ongoing problems. I believe my turbo may be malfunctioning or I have a major valve/vacuum leak- I'm not sure. Here are the codes:
P0507-Idle air control system RPM higher than expected
P0722-Output speed sensor circuit no signal
P0171-system too lean-bank 1


Last edited by Bayleybeee; 03-08-2012 at 01:39 PM.
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Old 03-24-2012, 05:26 AM
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Join Date: Mar 2012
Posts: 1
Default usautoparts

ShowMeTheParts is an Open Platform for Sharing usautoparts Automotive Aftermarket content
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Old 09-10-2012, 10:14 PM
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Join Date: Aug 2012
Posts: 1

Thats your abs sensor
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Old 01-17-2013, 12:07 PM
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Join Date: Jan 2013
Posts: 1

Originally Posted by SincereOne12 View Post
I would not suggest driving your car too far if you're check engine light is flashing because of a misfire. Your fuel will eat the hell out of your catalytic converter and your 100 ignition coil and whatever else you spend on coils will end up running you $4000 on a new cat. So watch it.
Well it shouldn't be a problem if he lives close to the auto parts store. It won't kill the car especially if he has been using it daily
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Old 04-14-2013, 02:15 PM
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Join Date: Apr 2013
Posts: 1

Got a call from my wife who told me that the CEL (which has been on for two months) started flashing and the car started running "funny" (she's not much of a car person). She immediately shut it off after pulling back into the garage. After reading a few of these posts, I have a couple of questions. Before I go too much farther, the car is a 2007 a-4 cabriolet Conv.

1. I recently drove off from a gas station with my gas cap off, and read here that that's bad. Assuming that no one tampered with my car, why would this cause the CEL to come on?

2. I have an extended warranty, and if its something serious like coils or the cat converter, are these things usually covered?

3. When they plug the car in and read the fault code, does it tell them how long the CEL has been on. I'm wondering if driving it so long with the light on will void the warranty?

Thanks in advance!
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Old 07-15-2013, 07:26 PM
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Join Date: May 2011
Location: Saint Louis, MO
Posts: 29
Default Vag - obdii

Whats the difference between a OBDII and A VAG

Is it worth getting a VAG?
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Old 10-04-2014, 05:43 AM
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Join Date: Jul 2014
Posts: 35

This thread is about as useful as the cel telling you anything besides it's on.
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