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All Symptoms

Car is hard to start in cold weather

Needs attention soon

difficult cold start · takes several tries to start when cold

Symptom description

The car cranks for longer than usual or needs several attempts to start specifically in cold weather, while starting normally once warm.

Common causes

  • Worn glow plugs (on diesel engines, essential for cold starting)
  • A weak battery that struggles to deliver enough current in the cold
  • Thickened engine oil in very cold temperatures increasing cranking resistance
  • A fuel system issue only exposed by cold-weather fuel vaporization differences

What to check

On a diesel, check whether the glow plug warning light illuminates and clears normally before starting - a light that stays on points directly at the glow plug system.

Can you keep driving?

Safe once running, but get the underlying cause checked before the next cold snap - cold-start issues tend to worsen as temperatures drop further.

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Descriptions are for guidance only and do not replace a workshop inspection. If you are ever unsure whether it is safe to keep driving, pull over in a safe spot.

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