2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P151B
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
89
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
battery sensor
Fault effect and breakdown warning
Driver information
Warning light:
No warning lamp or CC status report
