When you turn the key and hear a single click or rapid clicking but the engine doesn't crank, the cause is almost always electrical - and 80% of the time it's a weak or dead battery. The other usual suspects are corroded battery cables and a failing starter solenoid. The clicking is the starter motor trying to engage but not getting enough current to actually spin.
A jump start will usually get you home if the cause is the battery. But if the battery is more than 4 years old or won't hold a charge after a jump, replace it before it leaves you stranded somewhere worse. Most parts stores test batteries for free.
The single most common cause. The battery has just enough power to engage the starter solenoid (the click) but not enough to actually crank the engine. Could be from leaving lights on, an old battery, or extreme cold. Most parts stores test batteries for free in 5 minutes.
View Full Diagnosis - P0562 →Even with a good battery, corroded terminals (white/blue/green crusty buildup) prevent enough current from reaching the starter. Same with loose cable clamps. Cleaning terminals is free with a wire brush; new cables are $20-60.
View Full Diagnosis - Cable Diagnosis →The solenoid is the part that engages the starter motor when you turn the key - it's what makes the click. When it gets worn, it clicks but can't pull the starter into engagement. Replacement is $80-300 with labor.
View Full Diagnosis - Starter Diagnosis →The battery's negative cable bolts to the engine or chassis. If that connection is loose or corroded, current can't flow back to complete the circuit. Easy fix - find the ground strap, clean the connection, retighten.
View Full Diagnosis - Ground Diagnosis →If your alternator hasn't been charging the battery, the battery is drained even though you've been driving. Most parts stores test alternators for free. Replacement runs $200-500.
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If your scan tool is showing one of these codes alongside this symptom, that's your starting point. Click any code for the full diagnosis, common causes, and repair costs.
The clicking is the starter solenoid trying to engage. If you hear a single click or rapid clicking but the engine doesn't crank, the starter isn't getting enough electrical current to actually turn the engine over. 80% of the time the cause is a weak or dead battery.
If the cause is the battery, yes - a jump should get you running. If the cause is corroded cables, a bad starter, or bad ground, jumping won't help. Try jumping first - if it doesn't work, the issue is more than just the battery.
Try the headlight test: turn on your headlights, then try to start the car. If the headlights stay bright when you turn the key, the battery is probably fine and the starter is the issue. If the headlights dim or go out, the battery is weak. Also check the battery date - if it's 4+ years old, suspect the battery first.
New battery: $100-250. Cable cleaning: free if you DIY, $50 at a shop. New cables: $20-60 in parts. Starter replacement: $200-500 with labor. Always check the battery first - it's the most likely cause and the cheapest fix.