- Coolant Leak: A coolant leak can cause the engine to overheat, which can lead to a rough idle and the engine light turning on. Check the coolant level and look for any leaks in the hoses or around the radiator.
- Faulty Thermostat: A faulty thermostat can also cause the engine to overheat. The thermostat regulates the flow of coolant to the engine. If it's stuck closed, the engine can't cool down properly.
- Faulty Temperature Sensor: A faulty temperature sensor can give the engine computer an incorrect reading, causing the engine to run rich or lean. This can lead to a rough idle and the engine light turning on.
- Ignition System Issues: Ignition system issues, such as faulty spark plugs or wires, can cause the engine to run rough and misfire. This can also lead to the engine light turning on.
- Vacuum Leak: A vacuum leak can cause the engine to run lean and misfire. This can also lead to the engine light turning on.
- Catalytic Converter Issues: A clogged or faulty catalytic converter can cause the engine to run poorly and overheat. This can also lead to the engine light turning on.
If you're not comfortable troubleshooting the issue yourself, it's best to take your vehicle to a qualified mechanic.
