P1674

DTC P1674
Immobilizer - incorrect code Drive cycle A:Signal out of range - above maximum.

Possible causes by suggested order of priority:
- Motronic ECM not programmed with the correct code.

Motronic ECM not programmed with the correct code.
CHECK THE FOLLOWING:
- BCU or Motronic ECM has been replaced.
POSSIBLE FAULTS
- BCU has been renewed.
- Motronic ECM has been renewed.
- BCU has been put into diagnostic mode for testing.
DIAGNOSTIC HINTS
- If TestBook available, run security test on SUB-SYSTEM TEST menu.