When you do parameters programming or other flashing functions,it requires you to enter factory password,but sometime you will get error that ECM can not accept password.Here is a single post show on how to solve Perkins engine or generator ECM will not accept factory passwords.
Required Software:
Newest Perkins EST 2022A & 2019A Full Support Free Download
Probable Causes
One of the following items may not be recorded correctly on the electronic service tool:
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