Cod po501 audi a6 2005 - A6 Audi Cars & Trucks

You need to clarify the fault code, as the 'f' is not valid.
Removing the 'f' gives 10 possible fault codes (0-9) ranging from manifold flap issues to the Evaporator circuit (relevant for diesels?) to the exhaust DPF needing a regeneration...

SEND VIN NUMBER

call audi of america with that serail number and your vin they will give you the code

If all the brake lights stay on then the brake light switch is the first thing to check. It cod also be dagger wiring to the switch or it may just be loose and/or out of place.

The serpentine belt diagram for Audi A4 1.9 TDI:



CS = Crankshaft
F = Fan pulley
Gen = Alternator
T = Tensioner
AC = Air Conditioning
PAS = Power Assisted Steering

IMPORTANT NOTE: You must have the security anti-theft code for yours Audi Concert radio from the car manufacturer! For Audi Concert the sequence of programming is:
1. Push simultaneous "SCAN" and "RDS" keys until on the screen will appear "1000" displayed.
2. Release keys. No more push on "SCAN" and "RDS" keys because otherwise number "1000" will be considered as first safe code attempt.
3. By the #1 key you will set up the first safe code digit.
4. By the #2 key you will set up the second safe code digit.
5. By the #3 key you will set up the third safe code digit.
6. By the #4 key you will set up the four-th safe code digit.
7. Then push again simultaneous "SCAN" and "RDS" keys for confirm this safe code. On the screen will be displayed "SAFE" notice. Release keys! For few seconds a radio frequence will be displayed. The radio is now ready for use!

vehicle speed sensor out of range performance.Replace the vss,the vehicle speed sensor.

i have a po501 code is tis an easy repair?

my audi a6 2.8 i need radio cod

Best bet is to talk to the Dealership, they have technitions that can better handle the situation.
My guess is they will tell you that the only method would be to either, "brute force" hack it trying an infinite number combination, or to buy a new head unit.
Best of Luck.