Check Engine Light: Why is it on?

October 22nd, 2018 by

So, it happened. Your worst nightmare seeped into reality. The check engine light lit up on your dashboard, and you wonder why it’s on since your Porsche is still running smoothly. What could be wrong?

Here are the 5 most common reasons why:

1. Gas Cap

The gas cap may seem like the least important piece in your Porsche,  but it actually maintains the engine pressure and prevents fuel vapors from leaking out. A loose, broken, or missing gas cap can cause your vehicle to start jerking and lower its efficiency. So, it should be the first thing to look at when the check engine light comes on, see if the cap is tightly screwed, then allow your Porsche to reset. If the light remains on after a day, give us a call at (510) 279-7060.

2. Oxygen Sensor

The oxygen sensor in your Porsche monitors the percentage of unburned oxygen in the exhaust. Over time, the sensor can get covered in ash, reducing its effectiveness and leading to a decrease in gas mileage and an increase in emissions.

3. Catalytic Converter

Your catalytic converter reduces exhaust gases by converting carbon monoxide and other harmful materials into harmless ones. Most failures are down to faults with other items, but a damaged catalytic converter can mean your car will fail its emissions test.

4. Mass Airflow Sensor

The mass airflow sensor allows your car’s computer to know how much fuel is needed based on the amount of air coming into the engine. Faults can decrease efficiency, increase emissions, and cause your car to stall.

5. Spark Plugs and Wires

Spark plugs and wires are responsible for creating the original spark that initiates combustion within your Porsche, but they can fail over time. If yours are faulty, misfires will occur.

Your Porsche Check Engine Light is never something you should ignore.

While these reasons may sound unimportant, they can develop into a much more complex issue over time. Fremont, Pleasanton, San Jose, and the Bay Area drivers should stop by Porsche Fremont to have a Porsche Certified Brand Ambassador technician inspect your vehicle.  Contact us here or call us at (510) 279-7060 to learn more about our Service Center, Service Specials, and Pick-up and Delivery Services.