P1681

2B55 - P1681

Information saved in
DME

Fault code
2B55 - P1681

Fault text
Internal fault within control module

Fault description


Condition for fault identification
Test condition:
No malfunction in crankshaft position monitoring
Terminal condition: Terminal 15
Voltage condition:
none

Condition for fault memory entry
Internal rpm deviation in control module of
K_N_E2_DELTA for a period of K_N_E2_T_Max

Action in service
1. Delete stored DTCs from error memory
2. Update DME
2. Replace DME

Fault effect and breakdown warning
Reduced power / engine 3500 rpm limited / Check Control
message / MIL comes on after engine runs 2x

Driver information
Warning light:
29-Engine malfunction

Service instruction
none