Could be low battery voltage, a poor connection(s) of wires, a bad starter, or a faulty solenoid.
The clicking sound is probably your solenoid trying to work. Your battery has just enough electricity to make the solenoid operate but not enough electricity to make the starter work. You probably have an almost dead battery.
If your car makes a clicking sound when you try to start it, try to jump the battery. If that starts it, check the electrical system and if it was the battery, replace the battery. If jumping it does not fix it, have a mechanic look at it.
Battery is dead or you have a bad solenoid. Connections at the solenoid and/or starter could be loose or corroded.
Then your battery is still not charged. The clicking sound is the solenoid that has a little gear on it that engages with the ring gear of the engine to spin it. There is a certain amount of voltage needed to push that solenoid into the ring gear and your battery isn't putting out enough. You'll need a jump to get started and then need to consider the battery.
Bad Battery: the clicking is the starter solenoid relay making contact but the battery is not putting out enough amps to turn the starter
check the solenoid, and the starter.
That clicking noise you hear when you press and release the brake pedal is the "Shift Lock Solenoid" engaging and disengageing. The shift lock solenoid is located below the center console directly underneath the gear shift lever. That sound is normal.
clicking sound but engine wont turn over. jump across terminals on starter if engine turns over solenoid is bad.
The starter solenoid near the battery should be checked.
Probable causes: loose cable or wire; faulty starter relay or solenoid.
Sound is probably not the starter, but the solenoid.... oscar drive ton car au garage... plus facile unless tu veut changer ton starter, solenoid vien avec............ -- vince
If it has two wires and two vacuum lines, then it is the purge solenoid and clicking is normal.