Car Diagnostics · Decatur, GA

Car Diagnostics in Decatur, GA

Most expensive repairs start with a bad guess. Big Tee Auto Repair does real diagnostics in Decatur, GA — pulling codes is just the first step, then testing to confirm the actual cause before anything gets replaced.

No-start problems, check engine lights, electrical gremlins, AC issues, and performance complaints all get the same treatment: troubleshoot first, explain what’s happening, then quote the fix. Big Tee has been troubleshooting vehicles since 1997.

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Since 1997Free call-out within 10 miWritten quote first

When You Need a Diagnostic

Check engine light is on or flashing
Car won’t start or starts intermittently
Rough idle, stalling, hesitation, or power loss
Electrical issues — lights, sensors, accessories
AC not cooling or heat not working
A noise or symptom you can’t pin down

What a Big Tee Diagnostic Covers

Code reading plus real-world testing
No-start diagnosis — battery, starter, alternator, fuel, ignition
Sensor, wiring, and electrical diagnosis
Drivability and performance issues
AC and charging-system checks
A clear explanation and a quote for the fix

Diagnostic-First Car Diagnostics in Decatur, GA

When a vehicle problem is misdiagnosed, the wrong repair can cost more than the original issue. For car diagnostics in Decatur, Big Tee starts by checking the symptoms, inspecting related parts, and narrowing the issue down before recommending a repair — then quotes the job in writing before any work begins.

Mobile or Shop-Based Car Diagnostics in Decatur

Some car diagnostics work can be handled where the vehicle sits, depending on the job, location, tools needed, and safety. Larger repairs are handled at the shop in Decatur. You get the right setup for the job — not a tow you didn't need.

Car Diagnostics for Cars, Trucks & Fleets in Decatur, GA

Cars & SUVs
Pickup trucks
Box trucks
Semis & fleet vehicles
Work & commercial vehicles
Domestic & import

Car Diagnostics Pricing in Decatur, GA

Typical mobile diagnostic / scan: $100 – $150+ per hour for cars, SUVs & light trucks. Labor only — most customers buy their own parts.

Free call-out within 10 mi ($50 beyond — trip fee waived if you book)
Diagnostic billed hourly from $100/hr — credited toward repairs $300+ in labor approved at that visit
Written quote — labor & total — before any work

Ballpark labor/service ranges for cars, SUVs & light trucks, meant to set expectations. Parts are not included — customers normally buy their own. If Big Tee sources a part for you it is billed at actual cost, with no markup, on top of the labor. Your exact price is confirmed in writing after diagnosis. Box trucks, semis & fleet vehicles are quoted after inspection. Engine and transmission jobs are handled at the shop in Decatur, not mobile.

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FAQ

Car Diagnostics in Decatur, GA — Common Questions

Is a code reader the same as a diagnostic?

No. A code points to a system, not the exact problem. Big Tee tests from there to confirm the real cause so you don’t pay to replace the wrong part.

Can you diagnose a car that won’t start?

Yes — no-start diagnostics are a core service. The cause could be the battery, starter, alternator, fuel system, ignition, sensors, or wiring, and we narrow it down.

Can diagnostics be done mobile?

Often, yes. Many diagnostics can be run where the vehicle sits in Decatur. Some deeper testing may need the shop.

What do I get at the end?

A plain-English explanation of what’s wrong and a written quote for the repair — parts, labor, and total.

Your question not here? Call or text. Big Tee responds.

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Stuck? Don't Tow It.
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Decatur and all over Metro Atlanta. 29 years of experience riding shotgun. Cars to semis. Call or send a quick text — we'll take it from here.

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29Years experience

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