1. No Clicking (Start Solenoid)

2. Intermittent Operation

3. No Start (Start Solenoid)

4. Transmission Shifting Problems (Shift Solenoid)

5. Check Engine Light
A faulty solenoid will trigger the Check Engine Light. The vehicle's On-Board Diagnostics System (OBD-II) will store fault codes that can be read with a scan tool and point to a specific solenoid or related component.
6. Erratic Engine Performance

7. Abnormal Noises

8. Electrical Problems