[SoftTalker]

"Currently, sales and shipping only available in state of CA."

So they don't want it to be used in CA, but are only selling it in CA. Hence the engine must be disabled.

[bluGill]

Buy it, take out the glow plugs and sell it out of state. new buyer just needs to sorce glow plugs which are consumable and cheap.

i don't know if this engine has glow plugs but there is likely a similear cheap part that if removed disables the engine.

[anticensor]

Uniflow diesels such as EMD engines don't have glow plugs, they instead have pre-pump fuel heaters.