Don’t ride the brake
This bulletin applies to the 2010 Audi A5 and S5 Cabriolet models, as well as others equipped with fly by wire throttle operation.
The customer may complain that the vehicle lacks power or will not move after a stop. Engine speed returns to idle (about 1400 rpm) although the accelerator is depressed. And/or the vehicle hesitates and lacks power upon takeoff.
With the introduction of EPC (electronic power control) fly-by-wire communication to the fuel injection system, an engine rpm control feature has been incorporated into the engine electronic control system software. Application of both the brake and accelerator pedals at the same time results in normal brake operation that overrides any throttle application. DTCs will not be stored.
If the brake pedal is depressed while the accelerator pedal is depressed, after approximately two seconds, engine rpm will return to idle speed. Inform the customer to avoid depressing the brake pedal at the same time as depressing the accelerator during a stop.