- A problem with the engine or emissions system: This could be anything from a faulty sensor to a major mechanical problem.
- A loose or damaged gas cap: A loose or damaged gas cap can cause the Check Engine light to turn on because it can allow fuel vapors to escape.
- A problem with the oxygen sensor: The oxygen sensor measures the amount of oxygen in the exhaust system and helps the engine control air/fuel mixture. A faulty oxygen sensor can cause the Check Engine light to turn on.
- A problem with the catalytic converter: The catalytic converter helps to clean up the emissions from the engine. A faulty catalytic converter can cause the Check Engine light to turn on.
If your Check Engine light turns on, it's important to have it checked out by a qualified mechanic as soon as possible. Driving with the Check Engine light on can damage your engine and emission control system.
