Bought a Used Car and the Check Engine Light Came On
Don’t Panic
The first thing you need to do is stay calm. A check engine light doesn’t always mean that your car is about to break down. It could be something as simple as a loose gas cap or a faulty sensor.
Check the Gas Cap
The most common cause of a check engine light is a loose or missing gas cap. When the gas cap is not properly sealed, it can allow fuel vapors to escape, which can trigger the check engine light. To fix this problem, simply tighten the gas cap and see if the check engine light goes off. If it does, you’re good to go.
Check the Oil Level
Another common cause of a check engine light is a low oil level. When the oil level is low, it can cause the engine to overheat, which can damage the engine. To check the oil level, simply pull out the dipstick and check the oil level. If the oil level is low, add oil until it reaches the full mark.
Check the Air Filter
A dirty air filter can also cause a check engine light. When the air filter is dirty, it can restrict the airflow to the engine, which can cause the engine to run rich. A rich engine produces more emissions, which can trigger the check engine light. To fix this problem, simply replace the air filter.
Check the Spark Plugs
Worn-out spark plugs can also cause a check engine light. When the spark plugs are worn out, they can misfire, which can cause the engine to run rough. A rough-running engine can produce more emissions, which can trigger the check engine light. To fix this problem, simply replace the spark plugs.
Check the Oxygen Sensor
A faulty oxygen sensor can also cause a check engine light. The oxygen sensor measures the amount of oxygen in the exhaust gases. This information is used by the engine to adjust the air-fuel mixture. A faulty oxygen sensor can cause the engine to run rich or lean, which can trigger the check engine light. To fix this problem, simply replace the oxygen sensor.
If the Check Engine Light Is Still On
If you have checked all of the above and the check engine light is still on, you should take your car to a mechanic. The mechanic will be able to diagnose the problem and fix it.
Conclusion
A check engine light can be a scary thing, but it’s not always a sign of a major problem. By following the steps above, you can often fix the problem yourself. If you’re not comfortable doing any of the above, you should take your car to a mechanic. Whatever you do, don’t ignore the check engine light. A small problem can quickly turn into a big one if it’s not fixed.
