My friends S4 pulled up the following codes, hoped you guys could help me out:

Part No: 8D0 907 389 E
Component: ABS/ESP Allrad D56
Coding: 04395
Shop # WSC 06435

2 Faults Found:
01435 - Brake Pressure Sensor 1 (G201)
- 35-10 - - Intermittent
005265 - Brake Light Switch-F
- 27 - 10 - Implausible Signal - Intermittent

 

Ross Tech Wiki told me to try the following solutions. How exactly do I perform these? We don't have a repair manual for this car.

Perform Basic Setting

* Check/Replace Brake Pedal Switch (F)
o See Measuring Blocks
* Check/Replace Brake Pressure Sensor 1 (G201)
o ABS Hydraulic Unit (N55) may need to replaced
o Perform Brake Pressure Sensor 1 (G201) Basic Setting
o Replace Brake Electronics Control Module (J104)