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EPC Light

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  #1  
Old 09-27-2007, 09:42 AM
KylesA4's Avatar
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Default EPC Light

Hey Everybody,

I did some searches through the threads and couldn't find anything specific... I need your help. I have a 02 A4 1.8t and its been giving me some problems lately. I had an ignition coil go bad lately soI replaced them all and it ran fine. But a few times lately when I start my car my EPC light will stay on. I also havestalled three timesslowing to red lights, and it takes a couple tries to get it turned over.

I have some ideas but I am not sure where to go until I pull some codes from Auto Zone at lunch. Has anybody had any similar problems?

Side note: on a recent road trip myoil light came on and I was forced to use a non synthetic thicker oil. I am scheduled to drop my car off on Tuesday for an oil change as my independent is very good but also very busy.

Thanks for all your help.
 
  #2  
Old 09-27-2007, 01:31 PM
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Default RE: EPC Light

Okay just got back from pulling codes.

I got the P0300
and a P0303

I am assuming the 303 is from the bad coil pack I replaced and never reset the code. The 300 indicates a cylinder misfire but in a random cylinder. It also lists the possible causes but I was wondering if anybody else encountered this same problem.

Thanks.
 
  #3  
Old 09-27-2007, 03:26 PM
CRAZYHAWK's Avatar
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Default RE: EPC Light

P0300 comes on when any of the following occurs;
P0301
P0302
P0303
P0304
 
  #4  
Old 09-28-2007, 02:41 PM
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Default RE: EPC Light

Gotcha thanks... I'm taking it in on Monday so I'll post what the problem was as soon as I find out.
 
  #5  
Old 10-02-2007, 11:28 AM
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Default RE: EPC Light

Okay... I said I would post what the shop found when I got it back so here goes. I think they are stumped. They told me they ran some codes and all of them dealt with the EPC. They reset the codes and $75laterits in my parking space. However when atidle rpms are still at 900 instead of the usual 1100. I don't know what to do and I'm sure it will be back in the shop before the week is out.
 
  #6  
Old 10-09-2007, 04:23 PM
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Default RE: EPC Light

Just thought I'd post my progress in case anybody needs it. Check engine light popped on again and got code P0321... Code indicated a problem in my crankshaft position sensor apparently aka the engine speed sensor. After messing around with the wiring, looked okay. I ordered the part ($70) and it will be here Thurs morning. I found a link that could be helpful to install it. I'll let you all know how it goes.

http://www.a4mods.com/index.php?page...eedsensor.html
 
  #7  
Old 10-12-2007, 12:58 PM
KylesA4's Avatar
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Default RE: EPC Light

Put the sensor in and have ridden 100 trouble free miles so far. Looks like it was the speed sensor.
 
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