Five Common Check Engine Light Triggers

Knowing some common reasons why your check engine light may come on helps you understand what you can do about it. Most of these issues do need prompt professional attention but do not necessarily take a great deal of money or time to fix. However, the problems this light indicates also tend to get worse if left to themselves. Taking your car to Tumwater Automotive for engine light diagnostics as soon as possible can save you further trouble and expenses down the line.

1. Damaged Catalytic Converter

The function of a catalytic converter is to change carbon monoxide into carbon dioxide. If your converter is not working properly, your vehicle may run at a higher temperature, use more fuel, and perform poorly. It will also fail mandatory emissions testing. Proper maintenance can keep this part working longer.

2. Worn-out Plug Wires or Spark Plugs

Spark plug wires run from the ignition coil to the plugs and deliver the spark that helps ignite the engine fuel and start your vehicle. A malfunction in the area can decrease your car’s power, and the engine may fail to start. It can also damage other parts, such as the catalytic converter, ignition coils, and oxygen sensor.

3. Faulty Oxygen Sensor

This sensor shows how much unburned oxygen there is in the exhaust system. A faulty sensor results in excess fuel usage, and it can also damage the spark plugs.

4. Malfunctioning Mass Airflow Sensor (MAF)

The MAF monitors how much air is entering the car engine to allow the optimal amount of fuel needed for maximum efficiency. If this sensor does not work properly, your car may use too much fuel and can sustain damage to other essential parts.

5. Loose, Missing or Damaged Gas Cap

The cap seals gas fumes inside the tank and maintains proper fuel pressure. If the seal is not tight, fuel can evaporate and you will need more gas.

If you see your check engine light come on, the professionals at Tumwater Automotive can quickly diagnose the issue and fix it. Use our online form or give us a call to schedule your service.