| Check engine light stays on | Emissions, ignition, fuel, air, sensor, circuit or mechanical concerns | Schedule diagnosis soon; avoid buying parts from the code alone. |
| Check engine light flashes | A severe misfire may be occurring | Reduce driving and seek prompt professional guidance to limit possible catalytic-converter damage. |
| Temperature warning or overheating | Coolant loss, fan, thermostat, radiator, pump or engine concern | Stop safely and shut the engine off. Do not open a hot cooling system. |
| Grinding, pulling or brake pulsation | Brake friction, hydraulic, rotor, caliper, tire or suspension concerns | Arrange a brake inspection; severe braking changes should not be ignored. |
| Shuddering or delayed transmission response | Fluid, control, mount, CVT/transmission or engine-performance issue | Schedule testing before the symptom worsens; do not assume a fluid change will solve it. |
| A/C blows warm or cools intermittently | Refrigerant leak, compressor control, electrical, airflow or component issue | Request A/C diagnosis instead of repeated refrigerant top-offs. |
| Hybrid-system warning | High-voltage, 12-volt, cooling, control or related system concern | Record the message and contact the shop to confirm safe next steps and service capability. |
| Oil or coolant under the vehicle | Seal, gasket, hose, housing, radiator or other leak source | Check fluid levels only when safe and schedule inspection; color and location alone may not identify the source. |