Anyone ever get code 1800 Chassis code?

[kobeecuhz]

2021 Toyota Supra with jb4 e30 map, exhaust , downpipe. Got the continued driving possible chassis code, anyone know what it may be?

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[Volpacchio]

I got the same code today! I cant find any information on this anywhere. I also got codes 102A, 6318, 0001.

Also looking for answers as the JB4 seems to not read them...