I had similar issue with my 2007 A4 Cab, EPC light coming on intermittently but CEL constantly on. Got it checked by Audi dealer. Turned out couple of power relays were burnt. Replaced those and now all Ok.

 

Hi All,
I need some help. I have a 2009 Audi S5 and the EPC and check engine light keeps coming on. I have taken the car to the deal and have had them scan the car for faults. I keep getting low fuel pressure. I have changed both high pressure fuel pumps, both low & high pressure fuel sensors and still am having the same issue.

I did change cylinder number 4 fuel injector due to it being stuck open and causing a miss fire. Any toughts or suggestions would be welcome. Audi's diagnosis was to change everything. They did not know what was causing the issue.

Thanks for your help!

 

Need help have a 2006 Audi A3 had a coolant hose split and replaced it after I filled it back up with coolant started the car and ecp light came on,tried to drive to see if code would go away around 2-3,000 rpm it sputtered and had no power ..it idles below 1,000 rpm

 

Greetings all. Just wanted to chime in. I just replaced my crankshaft speed sensor in my 3.0. Sensor is the same, but is in a different location compared to 1.8t. I had to pull the sensor from underneath. I did remove the heat shield guarding the sensor. By removing two Allen head screws (1 was 5mm and one was 4mm). My sensor was secured by a 1 hex head bolt (10mm). From the top, I found the toughest part was unbuttoning and buttoning the heat shield wrapping the sensor cables).

Because of time constraints, I went with a Bosch part from advanced auto (it was in stock) as I didn’t have to time order OEM.

Anyways, no start up issues so far.
Hope this is helpful to someone else with the 3.0.

2003 A4 Quattro Sedan. 3.0. 196,xxx miles and counting.

 

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