#
DTC 21

BME090267000W16

DTC 21 | Code word/ID number stored in immobilizer unit EEPROM cannot be read.
--- | ---
POSSIBLE CAUSE | • Defective immobilizer unit

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
- | INSPECT IMMOBILIZER UNIT • Turn ignition switch from LOCK position to START position for 2 seconds. • Does security light indicate DTC 21 again? | Yes | Replace immobilizer unit and reprogram immobilizer system. (See Immobilizer Unit Replacement.)
No | Immobilizer system is okay.