It has everything to do with the firing. Ignition system consists of the computer, the crank and cam position sensors, the coils, spark plugs, ignition control module, the ignition switch, and the associated wiring.
If you have no fire (no spark), one would start by checking if ignition switch turning on causes the coil to receive battery voltage on the coil primary wire.
Always check for trouble codes when an engine problem develops. Codes stored in memory may have clues to why it won't start. If no codes are present and no spark (no ignition), suspect a bad crank position sensor (it can be tested by a shop), or possibly a bad ignition control module (also can be tested at a parts store for free).
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