2019 BMW 128i Convertible (E88) L6-3.0L (N51) A L L Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts Page 245
During Terminal 15/wakeup request from IBS and critical
charge status
Short to ground in Terminal 15 wakeup wire
Terminal condition: none
Voltage condition:
none
Condition for fault memory entry
10 sec.
Action in service
1. With battery sensor disconnected, check Terminal
15/wake-up wire for shorts to ground
2. Check for non-approved connection of supplementary
electr. equipment to Terminal 15/wake-up wire
3. If fault code is stored, replace battery sensor
Fault effect and breakdown warning
Driver information
Warning light:
No warning lamp or CC status report
Service instruction
none
2E8D - P151B (DME)
2E8D - P151B
Information saved in
DME
Fault code
2E8D - P151B
Fault text
Intelligent battery sensor, function
Fault description
Battery Sensor Wakeup Circuit
Condition for fault identification
Test condition:
Terminal 15-Wakeup wire signal level implausible
Terminal condition: With each change in terminal-15 status,
i.e., off or on
Voltage condition:
none
Condition for fault memory entry
10 sec.
Action in service
1. Check Terminal 15/wakeup wire for opens and
intermittent contacts
2. With battery sensor removed and Terminal 15 off, check
Terminal 15/wakeup wire for short to battery voltage ->
Repair wire and/or check Terminal 15, control module
wakeup
3. With battery sensor removed and Terminal 15 on, check
Terminal 15/wakeup wire for short to ground
4. With battery sensor connected and Terminal 15 off, check
Terminal 15/wakeup wire for shorts to battery voltage ->
Replace battery sensor
5. With battery sensor connected and Terminal 15 on, check
Terminal 15/wakeup wire for shorts to ground -> Replace
