Back to all

What?s That Yellow Squiggly Line Anyway? (What Warning Lights Mean)

February 22, 2026

You may have noticed when you start your vehicle, you’ll see several symbols light up on the dash.  They’re different colors and shapes, and sometimes it’s hard to figure out what each of those symbols mean.

They are warning lights and symbolize something in your vehicle is sending you a message.  It’s the result of today’s vehicles having lots of computers.  The good thing about having so many of these warning lights is they can let you know there’s an issue in need of attention before a more serious failure.  

Sometimes it can be challenging to figure out what each light means, so here are some of the most common ones.  One looks like your vehicle’s engine from the side, the Check Engine light.  It alerts you to something as simple as a loose gas cap to a far more serious problem like an overheating engine.  When the Check Engine light comes on, bring it into our shop.  If it’s blinking or flashing, it likely has more urgent issues, so bring it in sooner.

Another warning light looks like a genie lamp with a drip at the end, and it’s the engine oil light. When it comes on, it means something’s wrong with the oil pressure, and that can be a sign of serious engine problems.  Don’t ignore the oil light and bring it in for service as soon as you can.

One warning light looks like an old-style thermometer with a bulb at the bottom and degree marks on the side sitting in fluid.  That’s all about your coolant level, and when it comes on, your engine may be overheating.  It’s another one that’s telling you to bring it in to us for service quickly.

When your brakes aren’t working right, a light comes on that looks like a circle with a pair of half circles at the sides and an exclamation mark in the middle. Driving with malfunctioning brakes is dangerous, and it’s another warning light that should prompt you to get your vehicle looked at very soon.

If you see a light on your dash you don’t understand, try looking it up in your owner’s manual or bring it into us so we can help decipher it.  Warning lights are there to help you, and so are we.

Tuffy Fort Wayne - Dupont Rd.
1910 W. Dupont Rd.
Fort Wayne, IN 46818
260.489.4800

More articles from Tuffy Fort Wayne (Dupont Rd.)

Steer Clear (Power Steering Pump Replacement)

February 15, 2026

When it comes to ease and precision of steering, todays vehicles are engineering marvels. One of the keys to just how good steering is lies in the refinement of power-assisted steering which we know simply as power steering. At the heart of the system is an electrically or belt-driven power ste... More

No Fuel-ing! (Fuel Filter Replacement)

February 8, 2026

Your vehicle has a few filters you might be somewhat familiar with. Theres the oil filter that removes impurities from your engines oil, and a couple of different kinds of air filters that prevent contaminants from getting into the engine and the cabin. But you may not know that your vehicle als... More

Smooth Operator (Shock Absorbers)

February 1, 2026

When you are comfortably headed down the road, you may not realize how many of the imperfections in the driving surface are being smoothed out, so you hardly feel most of them. You can thank your shock absorbers for a lot of that comfort, and its important to make sure you keep your shocks in go... More