Step-by-Step No-Start Car Diagnosis

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Checklist Tasks

• Check dashboard for warning lights or codes to target specific system failures.
• Test battery voltage with multimeter to verify sufficient power.
• Inspect battery terminals for corrosion or looseness.
• Listen for clicks on key turn, a sign of possible starter solenoid failure.
• Ensure gear selector is fully in Park or Neutral before cranking.
• Listen for fuel pump priming at key-on, indicating fuel delivery.
• Test headlights/electronics to check battery and main fuse health.
• Check under-hood fuses and relays for damage or looseness.
• Try spare key to rule out immobilizer issues.
• Check for moisture in fuse box or under hood causing shorts.
• Visually inspect serpentine belt for breakage.
• Sniff for strong fuel smell near engine; this suggests flooding or injector leaks.