Car Makes Clicking Noise – Causes, Diagnosis and How to Fix
If your car makes a clicking noise, the issue is usually related to a weak battery, bad starter motor, CV joint wear or electrical relay faults. This premium guide explains the most common causes and gives you a step‑by‑step diagnostic process to identify the problem accurately.
Symptoms
- Rapid clicking when turning the key
- Single loud click but no start
- Clicking when turning the steering wheel
- Clicking from wheels during acceleration
- Electrical accessories flickering
Main Causes
- Weak or dead battery (most common)
- Corroded or loose battery terminals
- Failing starter motor or solenoid
- Bad alternator causing low voltage
- Worn CV joint (clicking when turning)
- Faulty relays or fuses
- Low engine oil (lifter noise)
Step‑by‑Step Diagnosis
1. Battery Voltage Check
A weak battery causes rapid clicking from the starter solenoid. Measure voltage:
- 12.6V = fully charged
- 12.0V = weak
- Below 11.8V = discharged
2. Inspect Battery Terminals
Loose or corroded terminals cause poor current flow and clicking when starting.
3. Starter Motor and Solenoid Check
A single loud click with no crank often indicates a failing starter motor or solenoid.
4. Alternator Output Test
If the alternator is not charging properly, the battery drains and causes clicking on startup.
5. CV Joint Inspection (if clicking while turning)
A worn outer CV joint causes rhythmic clicking when turning or accelerating.
6. Relay and Fuse Check
Faulty relays can cause intermittent clicking from the fuse box area.
7. Engine Oil Level Check
Low oil can cause lifter ticking, which may be mistaken for clicking.
Relevant Fault Codes
- P0562 – System Voltage Low
- P0620 – Alternator Control Circuit
- P2509 – ECM Power Input Intermittent
- P0300 – Misfire (if ticking is engine‑related)
Recommended OBD2 Scanner
An OBD2 scanner helps diagnose voltage‑related issues by reading charging system data, battery voltage, alternator output and power‑related fault codes.
When to Seek Professional Help
- Repeated clicking with no crank
- Battery drains quickly after charging
- Alternator output unstable
- CV joint clicking during turns
- Electrical burning smell
