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A Brief Guide to Your Car's Check Engine Light from A-1 Auto Tech

Last updated 7 years ago

We’ve all seen the check engine light come on at some point. A Check Engine Light could be as simple as a loose or bad gas cap or as complicated as an Emission, Fuel, Ignition, Engine or Transmission problem.  

If your check engine light is on and your vehicle is running fine it will be okay to drive your vehicle to your next stop.  Please make sure to call a qualified mechanic and have this problem checked prior to taking a lengthy trip.  

Note: If your check engine light is flashing this could mean a catastrophic error in the system and do not drive your vehicle, this could possibly cause severe engine damage.

1. EVAP System

Your fuel cap or EVAP system could be leaking, causing a malfunction. “The Evaporative Emission Control System (EVAP) is used to prevent gasoline vapors from escaping into the atmosphere from the fuel tank and fuel system. The EVAP system usually requires no maintenance, but faults can turn on the Check Engine light and prevent a vehicle from passing an OBD II plug-in emissions test.”

2. Oxygen Sensor Malfunction

There could be a problem with your vehicle’s oxygen sensor, causing it to send faulty signal’s to your car’s computer. If your oxygen sensor takes an incorrect reading of the amount of unburned oxygen in your exhaust, then your car will end up running less efficiently and decreasing your gas mileage. Your auto repair shop can diagnose and repair this problem quickly and easily.

3. Broken Catalytic Converter

The catalytic converter is an important part of your exhaust system. It converts harmful gases produced during combustion into the less harmful ones come out of your tailpipe. But a broken catalytic converter does not just mean worse emissions. It can create a blockage in your exhaust system that will decrease your power and fuel efficiency. Broken catalytic converters make for expensive auto repairs, but rarely break unless something else fails, such as a spark plug.

4. Misfiring Spark Plugs

Spark plugs are quite literally what make your car go. They are the ignition source for the combustion that powers your car. If your spark plugs misfire, then you will lose a lot of power, waste fuel, and possibly damage your catalytic converter. Replacing spark plugs is an easy fix that can save you a lot of money down the road.

If your check engine light is on, stop by A-1 Auto Tech  in Mountain View for friendly and professional service. We provide repair services, maintenance, and parts for all of your automotive needs. Visit our website to see a list of our products and services or call (650) 265-4085 for more information.


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