A car that will not start is one of the most frustrating problems, especially on a cold morning. The good news is that the symptoms usually point clearly toward the battery, the starter, or the fuel and ignition system.
Listen carefully when you turn the key or press the start button.
Nothing at all
No dashboard lights and no sound usually means a completely flat battery or a disconnected or badly corroded battery terminal. Check the terminals for white or green crust and make sure the clamps are tight.
Rapid clicking
A fast clicking sound with dim dashboard lights is the classic sign of a weak battery: there is enough power to engage the starter solenoid but not to turn the engine. A jump start will usually get you going.
A single click
One loud click with normal dashboard lights can point to a faulty starter motor or solenoid. Sometimes a stuck starter frees up after a few attempts, but it will need replacing.
Cranks but will not fire
- ▸Out of fuel — fuel gauges can be inaccurate near empty
- ▸Fuel pump failure, often with no faint hum from the rear when you switch on
- ▸Immobiliser problem: check for a flashing key symbol and try the spare key
- ▸Ignition or sensor fault, which needs a diagnostic scan
Jump-starting safely
Follow the order in your owner’s manual. Generally: red clamp to the flat battery’s positive, red to the donor’s positive, black to the donor’s negative, and black to an unpainted metal point on the dead car’s engine away from the battery. Start the donor car, wait a few minutes, then try yours. Afterwards, drive for at least 30 minutes or charge the battery, and have it tested.
CAUTION: This is general automotive information, not professional mechanical advice. Always follow your vehicle manufacturer’s specifications and service schedule, and have brakes, steering, tyres, and other safety-critical systems inspected by a qualified mechanic.