I can't answer your direct question but in case you are not aware... You can take your car by a lot of auto parts stores now and they will check the codes for you for free.
I have about twelve years of Mazda experience, and do not understand "4130". This cannot be dollars. Is it shillings, perhaps? In any case, a reasonable tester can be obtained from any tool vendor. The 2000 Protege was pre-CAN, and so a basic OBDII tester will work just fine.
I have a generic tester from OEM that cost $100. It works fine on PCM codes up to and including 2007. The technology is amazing. I am willing to bet that there are even cheaper testers out there.
If you are able to pull the code(s), I would be happy to share what the definition is. I might even know common fixes, depending on your personal mechanical abilities.
If you're just looking to read and reset codes, there are a lot of options for code readers well under $100 that work just fine. Harbor Freight has several that are perfectly useable. If you want a true "scanner" that does more than read and reset codes then the cost is much higher of course.
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