Epc warning light? - A5_OC


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Old 8th November 2011, 08:14 AM   #1
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Default Epc warning light?

I was driving to work this morning and the EPC light came on. The car will not accelerate over 30 MPH. The Tachometer when it hits 3500 rmp the engine shakes and sputters. The car is at the Audi dealer now. Has this happened to anyone else? what was the issue?



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Old 8th November 2011, 09:14 AM   #2
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there's no huge thing to worry about, pretty much any modern german car will do that, it goes into limp mode to protect itself.

sometimes you can turn it off and back on a few times and that will reset it or disconnecting/connecting battery.

epc light came on mostlikely due to an abs sensor malfunction/dsc sensors, could be as simple as something hitting a wire while driving on the road, to pinpoint just need an error code/codes.

but since you already have it at the dealer...
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Old 8th November 2011, 10:35 AM   #3
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I found this in search: still awaiting from Audi on my car!

EPC Light comes on at 4000 rpm - clears on restart

The DTC code is as follows:

00135 P0087 fuel rail/system pressure too low

Possible causes

- Fuel pressure sensor harness is open or shorted
- Fuel pressure sensor electrical circuit poor connection
- Faulty fuel pump
- Blocked fuel filter
- Fuel line restricted
- Faulty fuel pressure regulator
- Faulty fuel pressure sensor



2010 Phantom Black S5
Tiptronic/Prestige/Sport Diff/Side Assist/Carbon Atlas/Advanced Key/Navigation Plus/28% tint/ Hoen H11 Fog Lights/ StaSIS ARB

SOLD 10/31/2012 GOT 37,500 IN TRADE NEW RIDE 2013 LEXUS GS350
Next up: 2014 RS5
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Old 8th November 2011, 11:12 AM   #4
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"there's no huge thing to worry about, pretty much any modern german car will do that, it goes into limp mode to protect itself."

All computer controlled automobiles have the same function. German or otherwise.

As others have said, the computer has detected something that could possibly damage the engine and therefore has put the engine into a safe mode. The problem could be triggered by a fault signal from a from a detector, of which the engine has many, or the need of a software update. Therefore only the error code will tell you specifically what triggered the "limp home" mode.
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Old 8th November 2011, 11:55 AM   #5
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Audi just called they are sending someone to pick me up and give me a loaner car as they think they will have the car for a few days. they suspect something in the fuel line or system.



2010 Phantom Black S5
Tiptronic/Prestige/Sport Diff/Side Assist/Carbon Atlas/Advanced Key/Navigation Plus/28% tint/ Hoen H11 Fog Lights/ StaSIS ARB

SOLD 10/31/2012 GOT 37,500 IN TRADE NEW RIDE 2013 LEXUS GS350
Next up: 2014 RS5
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Old 8th November 2011, 12:25 PM   #6
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This happened to me a year ago in my S5. I drove down a long dirt driveway and it came on when I actually reached the pavement. I had to drive 25 miles with the light on and eventually restarted the car and the EPC went away.

I wouldn't worry about it unless it keeps illuminating.

Good Luck

Anyone have VAG COM in Bay Area... I need to get rid of my 'winking' Please.

Thanks



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Old 8th November 2011, 03:05 PM   #7
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Problem solved they replaced the High and Low pressure sensors!



2010 Phantom Black S5
Tiptronic/Prestige/Sport Diff/Side Assist/Carbon Atlas/Advanced Key/Navigation Plus/28% tint/ Hoen H11 Fog Lights/ StaSIS ARB

SOLD 10/31/2012 GOT 37,500 IN TRADE NEW RIDE 2013 LEXUS GS350
Next up: 2014 RS5
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Old 2nd March 2014, 02:19 AM   #8
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I have an Audi A5 2.0 Model 2010
The car slows down + EPC light on + Check engine light blinking + white smoke.
They cleaned the injectors and changed on coil; the car worked normally.
It did again, cleaned the injectors again. After one month, had same problem. On top of top, the car is not starting smoothly. It went off before doing again same error (epc+check engine light+ white smoke)
Pls help
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Old 1st May 2014, 03:08 AM   #9
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Thank you for the*informative*posts.

Last edited by Ponimalaredy; 7th June 2014 at 01:32 PM.
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