No one ever wants to have their check engine light come on on their dashboard, but the reality of life is that it does happen. It doesn’t have to be a scary or daunting task to get it taken care of – we are here to help make it easier!
At Rob’s Import Repair, we make handling check engine light issues easier. We have the diagnostic tools to check what code is being shown and why that light is on. We can take care of the issue, get the light back off, and get you on your way again.
We Service the Following Brands
At Rob’s Import Repair, we provide a distinct and wide variety of services for the following brands:
- Acura
- Audi
- BMW
- Fiat
- Hyundai
- Kia
- Buick
- Cadillac
- Chevrolet
- Chrysler
- Dodge
- Ford
- GM
- GMC
- Honda
- Hummer
- Infiniti
- Isuzu
- Jaguar
- Jeep
- Land Rover
- Lexus
- Lincoln
- MINI
- Mazda
- Mercedes Benz
- Mercedes Sprinter Van
- Mercury
- Porsche
- SAAB
- Mitsubishi
- Nissan
- Saturn
- Scion
- Subaru
- Tesla
- Toyota
- Volkswagen
- Volvo
Check Engine Light
The check engine light is a warning signal on your dashboard that indicates something in your vehicle’s engine or emissions system needs attention. It can be triggered by anything from a loose gas cap to more serious issues like a failing oxygen sensor, misfire, or catalytic converter problem. While it doesn’t always mean an immediate emergency, it’s important to have it diagnosed as soon as possible with a professional OBD-II scanner to prevent further damage or costly repairs. If the light is blinking, pull over and seek immediate service—this signals a severe issue that could damage your engine.
Reasons Your Check Engine Light Is On
From a solid light to flashing, the check engine light can alert you to a larger issue.
1. Loose or Faulty Gas Cap
One of the most common causes—if it’s loose, missing, or cracked, it can trigger the light.
2. Faulty Oxygen Sensor (O2 Sensor)
A failing O2 sensor can reduce fuel efficiency and increase emissions.
3. Malfunctioning Catalytic Converter
If your catalytic converter is damaged or clogged, it can cause performance issues and trigger the light.
4. Worn Spark Plugs or Ignition Coils
Misfires from worn-out spark plugs or coils can affect engine performance and fuel economy.
5. Mass Air Flow (MAF) Sensor Issues
A dirty or faulty MAF sensor can throw off the air-fuel ratio, causing poor driveability.
6. Faulty Exhaust Gas Recirculation (EGR) Valve
A stuck or malfunctioning EGR valve can lead to increased emissions and rough idling.
7. Vacuum Leaks
Cracks in hoses or loose connections can cause engine imbalance and trigger the light.
8. Failing EVAP System Components
Issues in the evaporative emissions system (like a faulty purge valve or leak) can also cause the warning.
9. Transmission Problems
Some transmission issues can affect engine performance and lead to a check engine warning.
10. Battery or Charging System Problems
Low voltage from a weak battery or alternator can cause various sensors to malfunction.
At Rob’s Import Repair, we want to make sure you have the best experience. We can be found at:
- 310 Allegiance CT, Appleton, WI
- Kaukauna
- Little Chute
If you have a check engine light on, you can give us a call to get it taken care of!
Common FAQs About Check Engine Lights
What does the check engine light mean?
It indicates that your vehicle’s onboard diagnostic system has detected a problem—ranging from minor (like a loose gas cap) to serious (like engine misfires).
Can I keep driving with the check engine light on?
If the light is steady, you can usually keep driving, but you should have it checked soon. If it’s blinking, pull over—it signals a more serious issue that can damage your engine.
Can weather cause the check engine light to come on?
Sometimes—extreme cold or moisture can affect sensors or connections, but the light shouldn’t stay on long if it’s weather-related. We often see this issue here in Wisconsin – so if the light comes on during a super cold day, you might want to wait for it to warm up later in the day to see if it goes off on its own.
What’s the most common reason for the check engine light?
Believe it or not—a loose or faulty gas cap is one of the most frequent culprits!
How do I turn off the check engine light?
Fixing the underlying problem is the only safe way to clear the light. Mechanics can also reset it with a scanner, but it may return if the issue isn’t resolved. You want to be sure to find out the reason the light is on and then have it reset after the issue has been taken care of.
Is it safe to ignore the check engine light?
Not recommended—even if your car feels fine, ignoring it can lead to worse damage and more costly repairs. You don’t want to end up having to open your pocketbook and forking out money you didn’t plan on having to spend just because you ignored a light.
