Car Won't Start? Online Diagnostic Tool

A rapid clicking sound typically indicates that the battery has some charge but not enough amperage to engage the starter motor. This is often caused by a weak battery, corroded battery connections, or a failing starter solenoid.

Try holding the key fob directly against the start button while pressing it. If this works, the fob battery is likely weak and needs replacement. If the problem persists, the fob may need reprogramming or the car sensor may be faulty.

Yes, cold weather significantly reduces battery capacity and increases oil viscosity, making the engine harder to turn over. Batteries can lose up to 50% of their power in freezing temperatures. Using a battery warmer or keeping the vehicle in a garage can help prevent this issue.

Working lights indicate the battery has charge, but starting requires much more power. This issue often points to a bad starter motor, faulty ignition switch, or poor battery connection. A starter typically makes a single loud click when failing.

Signs of a failing fuel pump include: engine sputtering at high speeds, loss of power when the vehicle is under load, and difficulty starting. If you turn the key to on and do not hear a brief whirring sound from the rear of the car, the fuel pump may not be engaging.

Jump starting is generally safe when done correctly with proper cables and connection order. After a jump start, drive for at least 20-30 minutes to allow the alternator to recharge the battery. If the battery keeps dying, it likely needs replacement or there is a charging system issue.