2019 BMW 128i Convertible (E88) L6-3.0L (N51) A L L Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts Page 301
Warning light:
no external display;
Service instruction
none
2F63
2F63 - P0571
Information saved in
DME
Fault code
2F63 - P0571
Fault text
Brake-light switch, plausibility
Fault description
Brake Switch 'A' Circuit
Condition for fault identification
Test condition:
Brake light switch monitor
Depress brake pedal repeatedly
Terminal condition: Terminal 15 ON
Voltage condition:
Voltage in onboard electrical system > 10 V
Condition for fault memory entry
If the BTS is still OK the fault will be registered
immediately when the brake pedal is depressed. If the plug
is disconnected the fault will be registered after
approximately 40 sec.
Action in service
1. Check to determine whether foreign matter or objects
(dirt) are causing the switch to hang.
2. Electrical check on wire
a. --> If not OK, repair wire.
b. --> If OK, replace switch.
3. Check by depresssing the brake pedal repeatedly. No fault
should be stored.
Fault effect and breakdown warning
Driver information
Warning light:
If the switch is defective the cruise control or ACC will be
deactivated.
Display:
- Defective speed control or distance control failure
Service instruction
none
2F64
2F64 - P0703
Information saved in
DME
Fault code
2F64 - P0703
Fault text
Brake-light test switch, plausibility
