We’ve all been there. You’re cruising along the streets of Prescott, maybe headed down Gurley Street or out toward Watson Lake, when suddenly that little orange light on the dash pops up: Check Engine. It’s one of the most frustrating things about modern cars. you don’t get a full explanation on the screen, just a glowing symbol that leaves you wondering: Is this a minor hiccup or something serious?
At Heath’s Auto Repair in Prescott, we know how stressful it can be. So let’s break down some of the most popular reasons the check engine light comes on, and more importantly, what it means if it starts flashing or changes color. Read on to learn more.
Common Reasons Your Check Engine Light Comes On
1. Loose or Faulty Gas Cap
Yes, it’s that simple sometimes. If your gas cap isn’t tight, fuel vapors can leak and trigger the light. A cracked or damaged cap can do the same. Before you panic, check your cap first — tightening or replacing it may solve the issue.
2. Oxygen Sensor Failure
Your car’s oxygen sensor monitors how much unburned oxygen is in the exhaust. When it fails, your engine may burn more fuel than necessary and run less efficiently. Ignoring it for too long can damage your catalytic converter.
3. Faulty Spark Plugs or Ignition Coils
Spark plugs and coils keep your engine firing properly. If they start to fail, you’ll notice rough idling, reduced power, or even stalling. A bad spark plug is a common reason for a check engine light, and luckily, it’s usually a simple fix.
4. Mass Air Flow Sensor Issues
This sensor measures the amount of air entering your engine so the computer can balance fuel delivery. If it’s faulty, you may experience poor fuel economy, misfiring, or stalling.
5. Catalytic Converter Problems
The catalytic converter helps reduce harmful emissions. If it’s clogged or failing, your car won’t pass an emissions test and may struggle with performance. Replacing one isn’t cheap, which is why routine maintenance to prevent early failure is key.
6. EGR Valve Trouble
The Exhaust Gas Recirculation (EGR) valve reduces nitrogen oxide emissions. If it gets clogged, you might notice rough idling, decreased fuel efficiency, or the light popping on.
7. Vacuum Leaks
A car’s vacuum system does a lot from regulating emissions to helping brakes. If there’s a leak (from cracked hoses or a failing gasket), it can throw off the engine’s air/fuel mix and trigger the light.
The team at Heath’s Auto Service in Prescott, AZ would be happy to help with all of your automotive service needs!
At Heath’s Auto Service, we take pride in being your one-stop destination for full-service auto and truck repair in Prescott, AZ. Our team of skilled technicians possesses a wealth of experience and knowledge, allowing us to confidently handle domestic, Asian, and European vehicles with precision and expertise. Contact our team today!
