A scan tool shows codes and numbers. A lab scope and a thermal camera show what a signal or a part is actually doing, and we bring both to your vehicle.

Call 817-709-1357 Text us Request a work order

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

Check engine light in Haltom City

What a lab scope and thermal camera show that a code reader cannot

A scan tool reports what the computer thinks: codes, plus sensor values updated a few times a second. That is useful, but a sensor signal can drop out for a split second, too briefly for the scan tool to catch. A lab scope draws the actual voltage over time, so we can see a crankshaft sensor signal that cuts out, a coil that fires weakly, or an injector that is not opening right.

A thermal camera shows temperature as a picture. On a running engine, a cylinder that is not firing runs cooler at its exhaust port. A catalytic converter that has stopped working shows an outlet no hotter than its inlet. A corroded connection warms up from resistance. Those images let us confirm a cause before any part is replaced, which keeps the repair to what the vehicle needs.

Ready to get it looked at? Call or text 817-709-1357 and you will hear the price before any work starts.

Warning signs

Problems these tools are especially good at finding

Intermittent stalling

A crank or cam sensor signal that drops out for a fraction of a second.

Misfire with no clear cause

A weak coil or sticking injector shows up in its scope pattern.

Converter efficiency codes

A thermal image shows whether the converter is doing any work at all.

Flickering lights or slow cranking

A high-resistance connection shows up as a warm spot under load.

Overheating complaints

Cold spots on the radiator point to restricted coolant flow through part of the core.

How it works

How the tools fit into a visit

A short description of what the vehicle is doing is enough to start. From that, we decide which tools are likely to be useful.

At the vehicle, we start with a full scan and the freeze frame data, because the codes still point us to the right system. Then we pick the test that answers the question most directly: the lab scope on a sensor or ignition circuit, the thermal camera on a cylinder bank, converter or connector. When we have proof of the cause, we walk you through it and give you a price before any work begins. Sensor, coil and wiring repairs usually happen on the spot. Larger jobs are scheduled.

Around Haltom City

When advanced testing makes the biggest difference

Advanced testing pays off most when a problem has already outlasted one or two replaced parts, when the light comes and goes, or when the vehicle stalls or stumbles without a clear pattern. Those are the cases where reading codes alone tends to fall short. The vehicle can usually be driven while you wait, unless the light is flashing or it stalls while moving. Have notes ready on when the problem happens.

We cover all of Haltom City

Your driveway, your work lot or the roadside, anywhere in Haltom City. 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

See us on Google

Questions

Check engine light questions from Haltom City.

What is the difference between a lab scope and a scan tool?

A scan tool shows what the vehicle's computer reports, a few updates per second. A lab scope measures the signal directly and draws it as a waveform, so short dropouts and weak patterns are visible. We use both together. Call or text to have your vehicle tested.

What can a thermal camera find on a car?

It shows temperature differences: a cylinder that is not firing, a converter that is no longer working, a connection heating up from resistance, or a radiator with cold spots from restricted flow. It helps us confirm a suspicion before a part is replaced. Request a work order to get started.

Do you bring this equipment to my home in Haltom City?

Yes. The scan tool, lab scope and thermal camera all come with us, and testing happens where your vehicle is parked in Haltom City, at home or at work. If the repair turns into a bigger job, we schedule it. Call or text and we will plan the visit.

Why test first instead of replacing the most likely part?

Sometimes the most likely part is the right one, but when it is not, you pay for a part and still have the problem. Testing first matters most on expensive parts such as converters, sensors buried under the intake, or wiring harnesses. Text us and we will test before replacing anything.

Keep looking