my friend has a 2002 audi a3 1.8 5v turbo with automatic transmission. His esp light came on the other day so he brought it over for me to have a look at yesterday. After hooking it up with my vag com cable i found two fault codes, 1 was brake light switch and the other was brake pressure sensor. After clearing the codes they came back so the fault is still there. When i found the brake light switch code i checked to see if his brake lights were coming on and they werent!
I will be testing the brake light switch this morning and replacing if faulty. Could the faulty brake light switch throw the brake pressure sensor code as well? or are we looking at replacing the abs pump on his car?
Any hints, tips would be great as i havent got much knowledge of audi's tbh