What it means:
* The check engine light is on: This means the vehicle's onboard computer (OBD-II system) has detected a fault in one or more of the engine's systems or sensors.
* Car starts and stays started: This suggests the problem is not severe enough to prevent the engine from running. However, it's crucial to address the issue as it could worsen over time and potentially cause significant damage.
Possible causes:
* Sensor malfunction: A faulty sensor, such as an oxygen sensor, mass airflow sensor, or engine coolant temperature sensor, can trigger the check engine light.
* Electrical problems: A loose connection, short circuit, or faulty wiring can disrupt the engine's control system.
* Fuel system issues: Problems with the fuel injectors, fuel pump, or fuel pressure regulator can affect engine performance and trigger the light.
* Emissions system problems: Malfunctions in the catalytic converter, exhaust gas recirculation (EGR) system, or evaporative emission control system can cause the light to illuminate.
* Other engine-related issues: Other potential causes include a misfire, vacuum leak, or problems with the ignition system.
What to do:
1. Don't ignore it: Driving with a check engine light on is not recommended. It could indicate a problem that's getting worse and may lead to costly repairs if left unchecked.
2. Have it diagnosed: Visit a trusted mechanic or auto repair shop to have the check engine light code scanned and diagnosed. This will reveal the specific problem causing the light to come on.
3. Get it fixed: Once the problem is identified, have it addressed promptly. Depending on the severity of the issue, the repair could be simple or more complex.
Note: While the engine may still start and run, it's important to be aware that the performance may be affected, fuel efficiency might be reduced, and the problem could worsen over time.
