Question about 2005 Audi A4

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Check Engine light on

I have 2005 Audi A4. The check engine light on. I took it to Autozone and they said that 'Multiple Cylinder misfire' happened. They asked me to replace the filters and few wires (Not clear). Also asked if I got it tuned up recently. I said no. I got the 45K regular maintenance done recently but not sure if the tuneup is part of it. So, they suggested to get a full tuneup. Could anyone please recommend what to do. Also, please suggest if it is better to take to the dealer? Thanks in Advance.

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  • SerYoha Feb 19, 2009

    I got a 2006 A4 2.0 Turbo, just got it yesterday, first thing i noticed was the rattle, then on the way home from the dealership, i started getting the missfire and a check engine light came on every time it happened, im taking it back tomorrow, any suggestions on what i should do next? (except the obvious, running the diagnostics tomorrow on it) it seems like a lot of people experienced the same problem, so is a bad coil or what?

  • Anonymous Feb 20, 2009

    Interesting.... I have the exact same problem with my 2005 Audi A4. My check engine light came on 2 days ago. However, the dealer told me that my car needs cylinder head #2 to be replaced. Did I mention that I am only 2000 miles over warranty and this could cost me up to $5,000.00! As of today I am waiting for a loaner car. I hope Audi customer service out shines their cars!



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You carnt tune a modern car without chipping it !! i think your airmass meter has gone u/s or you have an air leak in the system somewhere

Posted on Jan 19, 2009


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If the check engine light is on? Take it to your local parts store for a free diagnosis. Usually it needs a tune up,spark plugs, cap and rotor if applicable. I don't do audi very offend but this is a start. good luck!

Jun 18, 2014 | 1998 Audi A4

1 Answer

While driving the car started to miss badly, the check engine light came on then began to flash. checked for codes, engine missfire was the only stored code. owners man. said cat. problem ?

It's not a cat problem or you'd have misfires on all cylinders. P0300 is random misfires, and the codes increment to show what cylinder is misfiring. P0301 is a misfire on cylinder 1, P0302 is cylinder 2, etc. You likely have a bad coilpack. Whichever cylinder is indicated, replace that coilpack.

Sep 16, 2010 | 2004 Audi A4

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2005 Audi A4 1.8T QT, cylinder 4 misfire p0304

I too have the same problem on my 2005 1.8t B6. I noticed a hole in the breather hose coming off the valve cover that runs to another port under the intake manifold. I have the hoses on order and should be here on Wednesday. I'll post again if that fixes my problem.

Sep 30, 2009 | 2005 Audi A4

1 Answer

2004 Audi A4 misfire

it is always a good idea to stay with o.e.m parts and yes there is updated parts in the newer coils. and yes the M.A.F will also cause misfire faults but will not make check engine light flash or make car shake and shudder. also check you wire harness going to your coils make sure your ground wires are not cracked. That could be the main culprate. good luck hope this helps

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Get a scanner on it. You save time AND MONEY.

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1 Answer

Check engine light

Nope, no check light is triggered by high RPM, unless you overrev and damage something. Go to AutoZone and have them do a code scan (a dealer will charge an hour's labor, but at AutoZone it's free). Post the codes as a reply here and we'll go from there.

Aug 04, 2008 | 2005 Audi A4

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