1. Faulty Oxygen Sensor: A failing oxygen sensor can cause the engine to run inefficiently, leading to power loss and triggering the service engine light.
2. Catalytic Converter Issues: A clogged or faulty catalytic converter can restrict exhaust flow and cause power loss.
3. Fuel Injector Problems: Dirty or faulty fuel injectors can affect fuel delivery, resulting in power loss and engine problems.
4. Spark Plug Issues: Worn-out or damaged spark plugs can lead to misfires, rough running, and power loss.
5. Ignition Coil Problems: Faulty ignition coils can disrupt the spark delivery to the cylinders, causing misfires and reduced power.
6. Transmission Problems: Transmission issues such as slipping gears or torque converter problems can cause loss of power and trigger the service engine light.
7. Air Intake Issues: A clogged air filter or other restrictions in the air intake system can limit airflow and cause power loss.
8. Vacuum Leak: A vacuum leak can disrupt the air/fuel mixture, affecting performance and triggering the service engine light.
9. Throttle Position Sensor Issues: A malfunctioning throttle position sensor can provide incorrect signals to the engine control unit, resulting in power loss.
10. Turbo/Supercharger Problems: If equipped, a faulty turbocharger or supercharger can cause reduced boost pressure, leading to power loss.
Remember that diagnosing the exact cause of the problem requires proper inspection by a trained technician. Connecting a scan tool to the vehicle's OBD-II port can often provide more information about the specific trouble code and help narrow down the issue.
