(803) 324-3999


Reliable Transmission Service

703.5 N Anderson Rd

Rock Hill, SC 2973

(803) 324-3999

Reasons for the Check Engine Light to be On

Reliable Transmission Service Blog

9 January 2019 Bookmark and Share

Reliable Transmission Service and Auto Repair - Rock Hill, SC

Don't disregard an illuminating check engine light. When your dashboard lights are lit, this could be an indication of an issue under your hood that requires immediate attention. Here are five reasons why your check engine lights may be on:

Faulty Oxygen Sensor - A defective oxygen sensor requires replacement and this could affect your gas mileage and efficiency. It could also cause damage to other components such as spark plug and the catalytic converter.

Gas Cap Issues - Your gas cap might be broken, loose, not on, or missing. The gas cap seals the fuel system and helps maintain pressure within the fuel tank. If there is an issue with the cap you can lose fuel through evaporation.

Damaged Catalytic Converter - This needs to be replaced, otherwise the vehicle won't pass the emission test. This converts harmful carbon monoxide into carbon dioxide. You car's performance will also be impaired with inefficient fuel economy,

Defective Mass Airflow Sensor - This sensor measures the amount of air entering the engine, this will determine how much fuel is required for efficient operation of your engine.

Broken Spark Plugs and Wires - Worn out spark plugs can cause catalytic converter clogging as well as ignition coils and O2 sensor damage.

Contact Reliable Transmission Service right away if your check engine light is on.

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