LR
All faults
EngineLow severity

Diesel hard to start when cold

Annoying rather than dangerous.

Symptoms

Long cranking on cold mornings, white smoke on start, rough running for the first minute.

Likely cause

Failed glow (heater) plugs, a faulty glow plug relay or timer, air in the fuel system or worn injection pump.

Suggested fixes

Listed roughly in the order most owners try them.

  1. 1

    Test and replace glow plugs

    Use a multimeter or test light to check each plug. Replace any open circuit plugs.

    Difficulty:
    Moderate DIY
    Cost:
    £ (Under about £50 in parts)
  2. 2

    Replace the glow plug relay

    Check for voltage at the plugs when the warning light is on.

    Difficulty:
    Easy DIY
    Cost:
    £ (Under about £50 in parts)
  3. 3

    Bleed the fuel system

    Bleed from the filter to the injection pump using the lift pump primer.

    Difficulty:
    Easy DIY
    Cost:
    £ (Under about £50 in parts)

This is general guidance gathered from owner experience and workshop practice, not a substitute for a workshop manual or a qualified mechanic. Costs are rough parts-only guides. Brakes, steering and suspension work affects safety, so if in doubt have it checked professionally.

Related faults