2. Ignition Key Failure: Test the ignition key for smooth rotation. It might be damaged or worn out.
3. Starter Problems: The starter relay or solenoid, ignition switch, or starter motor itself might be the cause.
4. Spark Plug Failure: Worn-out spark plugs that no longer emit the required spark are another possible culprit.
5. Faulty Fuel Pump: Check if the fuel pump is not functional or is obstructed.
6. Bad Fuel Quality: Old or contaminated fuel can obstruct the fuel flow.
7. Fuel Filter Issue: It could be clogged, causing inadequate fuel or even blocking it altogether.
8. Fuel Filter Issue: A clogged air filter restricts air intake hindering ignition.
9. Engine Coolant Temperature Sensor Problems: A failure can impede startup.
10. Bad Crank or Camshaft Sensor: Malfunctions affect ignition processes.
These are possible explanations, but further inspection using the correct diagnostic tools will pinpoint the problem.