Question about 2002 Audi A4

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EPC light a4

I have a 2003 A4, the EPC light has been going on and off for a the last month or so. Usually when I restart the car maybe 1/2 to hour or so after having used it. The engine will crank for 30 secs and will not start. After a few trys it starts again. Should I address the problem ASAP before it gets worse, or can this wait till I see what happens next?

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  • ostapd Nov 25, 2008

    at first it was a sensor 50 bucks to fix, now i have to have the entire engine wiring harness changed, dont know why but the car will not start. and now from an EPC light = $50 to EPC = $1800 and i have a warranty for it guess what not covered, get rid of that peice of *^$& excuse for car &$#%@ NEVER BUY AN AUDI.

  • 207233942 Mar 26, 2009

    i have a audi rs4 and sprayed throttle cleaner in by the maf nw the epc light stays on,there seems to be no power problem but light stays on,wat could be the problem,how cam i fix it

  • Anonymous May 13, 2009

    i have the same problem is the sensor the same on a A4 3.0L V6? And do you have the name of the sensor and how much did it cost to replace?

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NEEDS ABRAKE LIGHT SWITCH,,COMMON PROBLEM

Posted on Jun 20, 2014


Hi, I had a similar problem with my Audi A4 2.0L sport, year 2002, the mechanic advised me that this was to due to the cranckshaft sensor being faulty, once he changed this all was good.

Posted on Sep 11, 2008

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Dear produceqa_de,

I am not entirely familliar with this particular model, although in some similar models that I have worked on The epc (on deisel models) usualy indicates a problem with the particle filter.

This means that if your car has a particle filter and it has not reached a temperature that it can clean itself for a few months, it may become clogged and cause a restriction for the engine.

If you take your car to an audi dealer the mechanic will be able to do a quick test to confirm and he may then be able to overide the cleaning process and clean the filter. I would advise that this is done asap as dammage may be caused from very high exhaust temperatures.

Reguards Luke.

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1 Answer

Same thing happened to me!


your crankshaft positon sensor is defective. Replace it and the epc will never come back and no more dying out. this happened to me several times and it would just come and go. i replaced it and now the car starts right away and the epc light hasnt returned since

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find the trouble code find out wat code mean,s wat an replace wat is not working the code will tell u wat,s not working hope this help u

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