| Check engine light stays on |
Emissions, ignition, air, fuel, sensor, circuit or mechanical concerns |
Schedule diagnosis soon. Do not purchase a part based only on a trouble code. |
| Check engine light flashes |
A severe misfire may be occurring |
Reduce driving and seek prompt professional guidance to limit possible catalyst damage. |
| Engine temperature warning or overheating |
Coolant loss, thermostat, fan, radiator, pump or engine concern |
Stop safely, shut the engine off and never open a hot cooling system. |
| Knocking, ticking or abnormal engine noise |
Oil level or pressure, accessory, combustion, timing or internal mechanical concern |
Avoid continued driving if the sound is severe or accompanied by a warning light or pressure loss. |
| Harsh shifting, slipping or delayed engagement |
Fluid, electronic control, engine, mount or internal transmission concern |
Arrange testing before assuming a fluid service or replacement will solve it. |
| Grinding, pulling or brake pulsation |
Friction, hydraulic, rotor, caliper, tire or suspension concern |
Schedule a brake inspection; major braking changes should not be ignored. |
| A/C blows warm or works intermittently |
Leak, compressor control, electrical, airflow or mechanical concern |
Request diagnosis instead of repeated refrigerant additions. |
| Hybrid warning or reduced hybrid performance |
High-voltage, 12-volt, cooling, control or related system concern |
Record the message and call to confirm safe next steps and service capability. |