When cloning an older BCM2 module in an Audi A5 using Xhorse Multi-Prog, a common issue may occur during the write process:
Error: Chip data erase failed! Error code: 00000005 Parameter error
Even if the data is read correctly and written back without any modification, the error still appears.
Root Cause
At first glance, this looks like a data format issue, but in reality, it is related to:
Incorrect chip configuration/parameters in the tool
Not a wiring, voltage, or unlock issue (in this specific case)
Although factors like boot mode, security unlock, and stable power supply are critical for many BCM2 jobs, they are not the root cause here.
Conclusion
This is a tool configuration bug, not a hardware or connection problem.
Xhorse has been notified and is expected to release an update.
Tip
If you encounter similar erase/write errors:
Try alternative chip profiles
Don’t assume data corruption immediately
Always test read → write on the same unit to confirm behavior
Result: Successful BCM2 cloning after correct chip selection
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