We all know that's basically synonymous with "money," which is why 65 percent of Americans say they let their 'check engine' lights blaze away without investigating. Trouble is you might actually be ignoring one of the most common repairs you can fix yourself—or setting yourself up for disaster. O2 Sensor : The most common repair for the second year running, a faulty o2 sensor can reduce your gas mileage by a whopping 40 percent.
Just locate the sensor use your car manual for guidance , unclip it and slip in the new one.
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Catalytic converter: "In most cases, a catalytic converter won't fail unless a related part — such as a spark plug — is ignored for too long," the report says. You really don't want that to happen. The fix: The most common reason for catalytic converter failure is a faulty spark plug. If your converter's already tanked, you'll have to take it to a mechanic, Jacobsen advises.
This isn't a DIY kind of repair. This is another problem that can be traced back to bad spark plugs, as well as too much heat under the or just plain old age. Compare all your cars at once from one place, side-by-side! Get notified by email or text message when a car you're interested in drops in price!
Hide Show. Why is my check engine light on?
Your Oxygen Sensor is failing and will need to be replaced. What is an O2 sensor?
You Might Be Ignoring One Of The Simplest Car Repairs You Can Fix Yourself
Your oxygen sensor measures the quantity of unburned oxygen in your vehicle's exhaust fumes. What will happen if I don't get the O2 sensor repaired? Your engine will be less fuel-efficient as it will be burning more fuel than it needs, and a defective O2 sensor can also harm your spark plugs and exhaust system. Your Exhaust System needs to be checked. What is a Catalytic Converter? What if I don't get my exhaust system repaired? Your vehicle won't breeze through an emissions test.
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New vehicles are exempt for the first seven model years. Vehicles years will be inspected using onboard diagnostics OBD. If the check engine light is turned on, these vehicles will fail the inspection and need repairs. Learn more at EPA. Rapid Screen Roadside tests allow clean vehicles to skip emissions tests and this will be indicated on your registration renewal card. Spark Plugs or Plug Wires require repair. This continuous ignition is what keeps your car moving down the road. If spark plugs are not checked with regular services, cleaned or changed when necessary, they can cause problems to occur with the engine.
What are 6 signs you need to change your spark plugs? Engine has rough idle. All cars take outside air and pass it into the engine through the air filter. The mass airflow sensor measures the amount of air entering the engine. For an engine to perform properly, it needs a specific amount of air-fuel mixture. The car's computer reads the amount of air coming into the engine from the mass airflow sensor and then calculates the correct amount of fuel needed for proper engine performance.
If the sensor goes bad, the engine will not know the right amount of fuel to add, causing problems including poor gas mileage, lack of power and more.
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If the air filter is dirty it is common for the mass airflow sensor to get dirty and lose the ability to read the amount of air coming in the engine. Routinely changing your air filter can improve the lifespan of your mass airflow sensor. Check Your Gas Cap. When it's loose or cracked, fuel vapors leak out and can throw the whole fuel system off. This causes a reduction in gas mileage and increases emissions.