| Security Level | Request Seed | Send Key | Typical Purpose |
|---|---|---|---|
| Level 1 | 27 01 | 27 02 | Basic coding / variant coding |
| Level 3 | 27 03 | 27 04 | Adaptations, injector coding, DPF values, etc. |
| Level 5 | 27 05 | 27 06 | Reprogramming functions |
| Level 7 | 27 07 | 27 08 | Extended engineering access |
| Level 9 | 27 09 | 27 0A | Developer / engineering functions |
| Level 0B | 27 0B | 27 0C | ECU-specific advanced functions |
| Level 0D | 27 0D | 27 0E | High-security engineering access |
| Level 0F | 27 0F | 27 10 | Manufacturer-specific access |
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Jun 12, 2026 9:54 pm