What is code P0010 on 2001 AUDI A4?

P0010 - "A" Camshaft Position Actuator Circuit (Bank 1)
Car will run rough

Could be
Faulty oil control valve (OCV)
Open or short in the VVT/VCT circuit
Open or short in the OCV / solenoid valve
Damaged computer (PCM)

Check
Check the Bank 1 VVT/VCT system circuit wiring and connectors, repair if needed
Warm up the engine, test the operation of the OCV, replace or repair if necessary