1. Oxygen Sensor: A faulty oxygen sensor can cause the engine light to illuminate. The oxygen sensor monitors the amount of oxygen in the exhaust gases and adjusts the fuel mixture accordingly. If the sensor is not functioning properly, it can lead to an incorrect fuel mixture, which can cause the engine to run poorly and trigger the engine light.
2. Catalytic Converter: A faulty catalytic converter can also cause the engine light to come on. The catalytic converter helps to reduce harmful emissions by converting pollutants into less harmful substances. If the catalytic converter is not working properly, it can cause the engine to run inefficiently and trigger the engine light.
3. Spark Plugs: Worn-out or damaged spark plugs can cause misfires, which can lead to the engine light illuminating. Spark plugs provide the electrical spark that ignites the fuel in the engine. If the spark plugs are not functioning properly, it can cause the engine to run rough and trigger the engine light.
4. Fuel Injector: A faulty fuel injector can also cause the engine light to stay on. Fuel injectors deliver fuel to the engine's cylinders. If an injector is clogged or not functioning properly, it can cause the engine to run lean or rich, which can trigger the engine light.
5. Electrical Issues: Electrical problems, such as a loose or faulty wiring connection, can also cause the engine light to illuminate. Check for any loose or damaged wires or connectors that may be affecting the engine's electrical system.
If the engine light on your Harley-Davidson Road King stays on after starting, it's important to have it diagnosed by a qualified mechanic as soon as possible. Ignoring the engine light can lead to more serious problems and damage to your motorcycle.
