Here is a complete list of trouble codes for diagnosing why your E38 maybe throwing the ABS light or Trifecta of ABS,ASC, and Brake light.
[Bosch ABS ASC 5.7]
3 Ignition Timing adjustment
4 Rear left wheel speed signal
5 Rear right wheel speed signal
6 Front right wheel speed signal
7 Front left wheel speed signal
E ABS Valve Pump
F Return Pump
14 Transmission intervention
15 ABS/ASC control module
16 Speed signal from DME
17 Incorrect coding
18 Pulse gears
1B Idle speed increase
1E Rear left wheel-speed sensor wiring
1F Right rear wheel-speed sensor wiring
20 Front Right wheel-speed sensor wiring
21 Front Left wheel-speed sensor wiring
22 ASC changeover valve
24 Ignition fadeout
25 ABS/ASC control module
26 Choke valve control faulty
27 Choke valve servo motor
28 Choke valve potentiometer
2F Rear left outlet valve
30 Rear right outlet valve
31 Front right outlet valve
32 Front left outlet valve
33 Rear left inlet valve
34 Rear right inlet valve
35 Front right inlet valve
36 Front left inlet valve
37 ASC intake valve
38 CAN: short circuit
39 TPS signal from DME
3A CAN: interrupt to AGS
3B CAN: open circuit to DME
3F ABS/ASC control module
40 Long term scatter
42 Speed sensor supply voltage
43 Intermittent interference
44 Intermittent interference after ignition on
47 ABS motor relay service life
49 Throttle valve angle fault from DME
4A Engine torque fault from DME
4B Engine speed fault from DME
4C CAN: open circuit to DME
5D DDE fault
5E DDE fault
