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If you’re driving down the road and suddenly see that “check engine” light illuminated on your dashboard, it’s understandable to feel a sense of dread. Fortunately, in many cases, the fix is something you can handle yourself. Here’s what you need to know about how to fix the engine light on your car.
Check Your Gas Cap
The first thing to check is your gas cap. Believe it or not, this is one of the most common reasons for the engine light to come on. If it’s loose, tighten it up and see if the light goes away. If it doesn’t, move on to the next step.
Check Your Battery
If your battery is old, it could be causing the engine light to come on. Make sure your battery is in good working condition and that the connections are clean and tight. If your battery is more than a few years old, consider replacing it.
Check Your O2 Sensor
Your oxygen sensor measures the amount of oxygen in your exhaust system and helps your car’s computer adjust the fuel-to-air ratio. If it’s not working properly, it can cause your engine light to come on. You’ll need to replace it to fix the issue.
Check Your Air Filter
A dirty air filter can cause your engine to run poorly and cause the engine light to come on. Make sure your air filter is clean and replace it if necessary.
Check Your Spark Plugs
Worn or dirty spark plugs can cause misfires and trigger the engine light. Check your spark plugs and replace them if they’re worn or dirty.
Check Your Catalytic Converter
Your catalytic converter helps reduce emissions and can cause the engine light to come on if it’s not working properly. If you suspect your catalytic converter is the issue, you’ll need to take your car to a mechanic to have it checked and possibly replaced.
Check Your Mass Air Flow Sensor
The mass air flow sensor measures the amount of air entering your engine and helps your car’s computer adjust the fuel-to-air ratio. If it’s not working properly, it can cause your engine light to come on. You’ll need to replace it to fix the issue.
Check Your Vacuum Hoses
Your car’s vacuum system helps regulate various systems in your engine. If there’s a leak in one of the hoses, it can cause your engine light to come on. Check your vacuum hoses and replace any that are cracked or damaged.
Check Your Ignition Coils
Your ignition coils help create the spark needed to ignite the fuel in your engine. If they’re not working properly, it can cause misfires and trigger the engine light. Check your ignition coils and replace any that are worn or damaged.
Check Your Wiring
If all else fails, it’s possible that there’s a wiring issue causing the engine light to come on. Check your wiring for any damage or corrosion and repair or replace as necessary.
