If the check engine light is on in Your 2013 Subaru Impreza, the first thing to do is check the gas cap. A loose or damaged cap allows fumes to escape, which triggers the light. A failed oxygen sensor is pretty common, as well. This component measures unburnt oxygen in the exhauSTSystem. The vehicle's computer uses this information to regulate the air/fuel mixture that goes into the cylinders. When it fails, it affects the spark plugs and catalytic convertor. The mass airflow sensor could also be faulty. If the check engine light is accompanied with trouble starting, rough idling, or a change in the throttle pedal position, it's likely the mass airflow sensor. The light can also be triggered by issues with the spark plugs, spark plug wires, ignition coils, catalytic converter, vacuum, hoses, aftermarket alarm, and exhaust gas recirculation valve failure.
Dennis B
July 16, 2020
The "check engine light" in your 2013 subaru impreza may be illuminated by something as simple as a loose gas cap or may indicate a more serious problem associated with your vehicle involving the emissions system, o2 sensors, blown head gaskets or faulty or contaminated fuel lines.
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