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B2200 B0xxx · 车身（B） 高严重度
Anti-Theft / Key Data Mismatch
Stored key data does not match what the immobilizer or body module expects — typical after a module swap or an interrupted programming session.
严重程度说明： 高——立即停车诊断，继续行驶有扩大损坏的风险
你会注意到的故障现象
- No start with any key
- Immobilizer warning
- Multiple related fault codes
常见原因
按可能性从高到低排列——从最上面开始查。
- 1 ECU or body module replaced without key matching
- 2 Interrupted key programming
- 3 Corrupted immobilizer data
- 4 Wrong module fitted from another vehicle
如何排查
先做花钱最少、侵入最小的检查——大多数这类码不是零件问题。
- ✓ Confirm the module part number matches the vehicle.
- ✓ Check whether any recent programming was interrupted (low battery during the procedure).
- ✓ Read the immobilizer and ECU for matching status.
- ✓ Perform the manufacturer's key-learning procedure with the correct security access.
维修方案
- Re-match keys with professional tooling
- Replace with the correct module and program it
B2200 —— 常见问题
Can a flat battery cause this? +
Yes — voltage dropping during a programming session corrupts the data. Always use a stable supply.
Do I need the dealer? +
Not necessarily. Professional tools with the right security access can perform the same matching procedure.