A steady light and a flashing light mean different things. We come to your vehicle, read what the computer recorded, and test until we find the actual cause.

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Call hours: Mon to Fri 7:00 AM to 8:00 PM · Sat 9:00 AM to 4:00 PM

Check engine light in Keller

A steady light and a flashing light call for different moves

A steady check engine light means the engine computer found a fault and stored a code. The car usually drives normally, and in many cases it is fine to keep using it for a short while until it gets checked. Causes range from a loose gas cap to a worn oxygen sensor or a small vacuum leak.

A flashing light is more serious. It usually means an active misfire bad enough that unburned fuel is reaching the catalytic converter, where it can overheat and ruin the converter. If the light is blinking, ease off the gas, avoid heavy loads and hard acceleration, and park as soon as it is safe. We can come to wherever it stopped and work out which cylinder is missing and why.

How it works

Describe the problem

A quick call or text with the symptoms and where the vehicle is.

Approve the price

Nothing gets touched until you say yes to the number.

Get it fixed onsite

We do the work in your driveway, lot or job site.

Warning signs

What the light is telling you

Steady light, car drives normally

A stored fault that needs checking soon, though rarely one that leaves you stranded.

Light blinking on and off

An active misfire that can overheat the catalytic converter, so slow down and park.

Flashing only under load

A misfire that appears when climbing a grade or carrying weight, often from a weak coil.

Steady light with a rough idle

The fault is changing how the engine runs and should move up your list.

Light plus a red warning

High engine temperature or low oil pressure means pull over and shut it off.

Around Keller

When to call and what to have ready

If the light is flashing, get in touch right away and keep the vehicle parked. A steady light can usually wait a few days, but letting it go for weeks gives a small problem room to grow and can hide a second fault behind the first one. Have the year, make, model and mileage handy, plus a note on when the light first came on and whether anything else changed.

We cover all of Keller

Your driveway, your work lot or the roadside, anywhere in Keller. Call or text with the year, make and model and what the vehicle is doing.

Call 817-709-1357

Engine work in progress under the hood of a truck

Why Day's

Shop-level work, where you park.

We bring dealer-level diagnostic tools, including a lab scope and a thermal camera, to wherever your vehicle is parked.

Fords are our specialty, built on years of maintaining a construction company's fleet, from cars and light trucks to heavy-duty work trucks.

About Day's

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How it works

How we handle it from the first text

Start with a call or a text. Tell us whether the light is steady or flashing, what the vehicle is, and anything that feels different when you drive. That detail helps us decide what to bring.

We come to the vehicle where it is parked, connect our scan tool, and read the stored codes along with the freeze frame data, a snapshot of speed, temperature and load at the moment the fault set. Then we test the system the code points to. Once we know the cause, you get a price before any repair begins. Many fixes, such as coils, plugs and sensors, are handled right there. Bigger jobs are scheduled for a time that works for you.

Questions

Check engine light questions from Keller.

Is it safe to drive with a steady check engine light?

Usually for a short time, as long as the vehicle drives normally and no red warning lights are on. The risk is that a small fault grows or masks a second one. Text us the year, make and model, and we will tell you how soon we can look at it.

What should I do if the light starts flashing while I am driving?

Ease off the gas, skip hard acceleration and get off the road somewhere safe. A flashing light usually means a misfire that is sending raw fuel into the catalytic converter. We can come to the vehicle in Keller and find the misfire where it sits. Call or text with your location.

Does a steady light ever turn into a flashing one?

It can. A weak ignition coil may set a steady misfire code at first, then fail badly enough to flash the light under load. Catching it while the light is steady usually means a smaller repair. Request a work order and we will check it before it gets that far.

Can a loose gas cap really turn on the light?

Yes. The evaporative emissions system checks itself for leaks, and a cap that is loose or has a worn seal can set a leak code. Tighten it until it clicks and drive normally for a few days. If the light stays on, send us a text and we will set up a diagnosis.

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