What’s That Yellow Squiggly Line Anyway? (What Warning Lights Mean)
June 21, 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.
Courtesy Auto Repair Plus
967 Bon Air Ave
Tiffin, Ohio 44883
419-443-0797
www.courtesyautorepairplus.com
More articles from Courtesy Auto Repair Plus

Road Ready (Trip Inspection)
August 2, 2026
Maybe you've been cooped up for a while and are yearning for a change of scenery. Or maybe you need to visit a relative who lives far away. You choose not to fork out the big bucks for airline tickets, so it's time for a road trip. Make sure you're road ready by having your vehicle professiona... More

Protecting Your Vehicle from Theft in Tiffin, Ohio
July 26, 2026
Every car in Tiffin, Ohio, is at risk for theft. So it's up to us to make our cars a less appealing target and more of a challenge hopefully sending potential thieves to look elsewhere.The National Insurance Crime Bureau recommends a layered approach to protecting vehicles: Common sense Visi... More

The Little Valve that Could (PCV Valve Replacement)
July 19, 2026
It's easy to get letters like PVC and PCV mixed up. PVC is a plastic that's used in a lot of things, especially plumbing pipes. And PCV is a valve that helps your engine burn off excess fumes rather than having them pollute our atmosphere. PCV stands for positive crankcase ventilation. When ... More
