2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
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P0478
2F6C – P0478
Information saved in
DME
Fault code
2F6C – P0478
Fault text
Exhaust-gas flap, activation
168
Fault description
Exhaust Pressure Control Valve High
Condition for fault identification
Test condition:
Exhaust valve control-activation monitor
Component must be installed
Tester must be used to trigger component for 10 sec.
Terminal condition: Terminal 15 ON
Voltage condition:
Voltage in onboard electrical system > 10 V
Condition for fault memory entry
2 sec.
Action in service
1. Check wiring
Repair if defective
If wiring is OK proceed
to check component (which and how?)
Fault effect and breakdown warning
