2017 Impreza No-Start, Just Clicking Sound

ClearTheCode admin answer: A rapid clicking sound when trying to start your 2017 Subaru Impreza, especially with dim dashboard lights, is a classic symptom of a few common issues related to the starting system. Even if your battery is only two years old, it's still the most likely culprit or a related component.

Here's a breakdown of what to check:

1. Battery Charge: Despite its age, the battery could be discharged or have a dead cell. The dim lights and clicking indicate insufficient power to engage the starter motor. Even a jump start might not work if the battery is severely discharged or faulty, as it can't hold a charge.
   • Action: Have the battery tested at an auto parts store. They can check its voltage and cold cranking amps (CCA).
2. Battery Terminals and Cables: Loose, corroded, or damaged battery terminals and cables can prevent proper current flow. Even if the battery is good, poor connections will mimic a dead battery.
   • Action: Inspect the terminals for corrosion (white powdery substance) and ensure they are tightly secured. Clean any corrosion with a wire brush.
3. Starter Motor: If the battery and connections are good, the starter motor itself could be failing. The clicking sound might be the starter solenoid engaging but not getting enough power to turn the engine, or the solenoid itself could be faulty.
   • Action: A mechanic can test the starter motor directly.
4. Alternator: While less likely to cause an immediate no-start unless it failed while driving and drained the battery, a faulty alternator prevents the battery from recharging.

When to see a shop: If cleaning the terminals and attempting another jump start (ensuring good connections) doesn't work, or if the battery tests good, it's time to call a tow truck. A professional can accurately diagnose whether the issue is the battery, starter, or a wiring problem. Do not repeatedly try to start the car as it can further drain the battery or stress the starter.