Air Flow Sensor Engine Light Price To Replace Mass The Top Eight Check Engine Light Issues

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The Top Eight Check Engine Light Issues

According to CarMD’s 2013 Vehicle Health Index, car repair costs are up 10 percent this year. Putting off car repairs is a bad idea because unfixed problems often make repairs more expensive. If the check engine light comes on in your car, take the car to a qualified mechanic immediately. Here are the top eight most frequent causes of check engine light activation.

1. Oxygen sensor failure

Oxygen sensors keep engines running at high efficiency levels and manage emissions. O2 sensors monitor exhaust gases from the engine. Engines require a precise ratio of fuel to air for the most efficient operation. Malfunctions can drop your fuel economy by up to 40 percent. Engine performance is also negatively affected.

2. Ignition coil problem

The ignition coils draw current from the battery and ignite the spark plugs. When the coils and spark plugs aren’t working properly, the current that powers your car’s engine is interrupted. All parts of a car’s electrical system are subjected to a lot of wear and tear due to the electricity passing through them.

3. Spark plugs and spark plug wires

Along with ignition coils, spark plugs and wires are important components of a vehicle’s electrical system. Symptoms of plug and wire problems include rough engine idling, engine misfires or pings, erratic engine power, including power loss and power surges. Fuel economy drops when the engine misfires. Ignoring spark plug and plug wire problems can permanently damage a car’s catalytic converter, leading to very expensive repairs.

4. Mass airflow sensor malfunction

A mass airflow sensor, or MAF, measures air entering the engine and calculates how much fuel to add to the mix. This data goes to the engine control unit (ECU). Without proper information from the MAF, the ECU cannot balance or distribute the correct amount of fuel to your engine. The result is very poor engine performance and a 10 to 25 percent reduction in fuel efficiency. Replace this critical component immediately if it begins to fail.

5. Defective vacuum hose or evaporative emission control system

A car’s evaporative emission control system (EVAP) prevents gasoline vapors from the fuel system and gas tank from being released into the air. Leaky vacuum hoses and vents, faulty valves, and defective gas caps all contribute to EVAP system problems.

6. Exhaust gas recirculation valve and ports are dirty

An exhaust gas recirculation system (EGR) controls your car’s emissions and helps the car run more efficiently. A rough idle, engine hesitation, and misfires may indicate an EGR problem. Poor performance and fuel economy are often caused by EGR problems. Often EGR system components are dirty or clogged.

7. Catalytic converter failure

Catalytic converters are often the most expensive mechanical repair on vehicles. As part of the exhaust system, it converts hazardous chemicals in car exhaust into less harmful compounds to release into the air. Catalytic converters should last the life of the car. Most problems with catalytic converters come from root problems such as bad spark plugs or problems with the ignition coil.

8. Dead battery and charging system problems

Most cars have a computer system that monitors the voltage in the electrical and battery systems. Computers activate the check engine light when they see something wrong with the car’s charging system. High temperatures in the engine compartment cause rapid aging of the battery.

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