Car won’t start (clicks or cranks but won’t fire)

What this usually means

When you turn the key and nothing happens, the cause depends on what you hear. A single click or rapid clicking with dashboard lights dimming usually means a dead battery or a starter problem — an electrical issue. If the engine cranks (turns over) but won’t catch and run, the problem is more likely fuel, spark, or a sensor that tells the computer the engine is turning. Narrowing down “won’t crank” versus “cranks but won’t start” is the single most useful first step.

Most likely causes

• high
  Dead or weak batteryBy far the most common no-start cause, especially in cold weather or after lights were left on. Often shows as clicking and dim lights.
• high
  Corroded or loose battery terminalsPoor connections mimic a dead battery and are a quick, cheap fix once spotted.
• medium
  Failing starter motorA single loud click with a good battery often points to the starter rather than the battery.
• medium
  Fuel delivery problemIf it cranks but won’t fire, a failed fuel pump or empty rail may be starving the engine.
• low
  Crankshaft position sensor failureWithout this signal the computer won’t fire spark or fuel, so the engine cranks but never starts.

How urgent is it?

Typical fix & cost

If it’s the battery or terminals, the fix is cheap and fast. A starter or fuel pump is a bigger job. Because a no-start can be electrical or fuel/spark, confirming the symptom (crank vs. no-crank) before throwing parts at it saves the most money here.

Common questions

Related OBD-II codes

If your car has stored a trouble code, these often come with this symptom:

Related symptoms

General guidance, not a substitute for a hands-on inspection. Cost ranges are broad reference ranges, not quotes. For safety-related issues, have the car inspected before driving.