You’re driving along when suddenly an orange, engine-shaped icon lights up on your dash. The check engine light – it’s a driver’s worst nightmare. While the reasons it appears can range from quick solutions to major repairs, don’t fret. We will walk you through some of the most common issues that trigger this warning light so you have an idea of what could be going on under the hood.
Oxygen Sensor Failure
The oxygen sensor analyzes levels of oxygen in your exhaust system. This allows your vehicle’s computer to regulate the air to fuel mixture being used. If it’s not working properly, your mileage will suffer and components like the catalytic converter may get damaged. The good news is replacing an O2 sensor is relatively inexpensive compared to some other repairs.
Loose or Faulty Gas Cap
One quick potential fix – make sure your gas cap is tightened fully and not loose or damaged. A loose fuel cap allows evaporative emissions to leak from the fuel system. This triggers a check engine light and often causes the light to turn off after tightening the cap properly.
Mass Airflow Sensor
The mass airflow (MAF) sensor calculates the amount of air entering the engine. It’s key for the engine management system to operate properly. Typical signs of a bad MAF include reduced mileage, rough idle and stalling.
Exhaust Gas Recirculation (EGR) Issues
The EGR system helps lower emissions by directing exhaust gases back into the combustion chambers. A blocked EGR valve can trigger the check engine light and rough idling. In most cases, the valve can simply be removed, cleaned and reinstalled by a DIYer. Replacement valves cost $100+ if needed.
Aftermarket Car Alarm Issues
Did you recently have an aftermarket alarm installed? Faulty alarms can wreak havoc by draining the battery or causing other glitches. Any check engine light issues that seem connected to a new alarm will require professional diagnosis and repair.
Dead Battery
Last but not least, a dead battery is the most obvious cause of failure to start. Batteries last much longer nowadays but still need replacement every few years. Purchase a quality replacement for around $100 or more. Safely install it yourself or have our pros handle it.
Diagnosing Issues
When the check engine light turns on, use an OBD-II scanner tool to read trouble codes stored in the vehicle computer. For simple fixes like a loose gas cap, the light may turn off on its own shortly after repair.
The Moral: Don’t Panic, Prevent
While the check engine light can seem ominous, in many cases it’s a minor repair. But don’t wait for that ominous orange glow before tending to your vehicle. Routine maintenance services at Auto Shop keep your car running smoothly and can help avoid many check engine light headaches in the first place. Our technicians inspect components and fluids, searching for any potential problems brewing under the hood. Don’t live in fear of your check engine light – call us today to schedule preventative maintenance and get quality repairs when issues arise!
