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Johnny's AutomotiveJohnny's Automotive
Winter Haven, FL

Computer Diagnostics at our Winter Haven shop

Bring it to our Winter Haven shop and we'll handle the computer diagnostics. Here's where to find us, when we're open, and how to book a time.

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Winter Haven, FL5100 Dundee RoadBook a time online
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Where to find our Winter Haven shop

Address, hours, and directions for the shop that handles your computer diagnostics.

Address

5100 Dundee Road
Winter Haven, FL 33884

Shop phone

(863) 949-2995

Hours

Mon to Fri, 7:30 AM to 5:30 PM; Sat and Sun, closed

Monday
7:30 AM to 5:30 PM
Tuesday
7:30 AM to 5:30 PM
Wednesday
7:30 AM to 5:30 PM
Thursday
7:30 AM to 5:30 PM
Friday
7:30 AM to 5:30 PM
Saturday
Closed
Sunday
Closed
Recent work

Computer Diagnostics jobs at our Winter Haven shop

Computer Diagnostics

November 2026 · Winter Haven

2018 Ford Transit-250

Drivability Concern Towed In With a Long Repair List

What the customer reported

The vehicle was towed in, and the owner brought a list of services from Ford. The owner asked the shop to check and advise of all needs on an estimate.

What we found and did

The technician ran the initial testing and diagnosed the drivability concern, including inspection of the specific vehicle system and a report of the test results and required repairs. The initial assessment was done at no charge. The team then wrote up an estimate recommending removal and replacement of the PCM processor and a hood scoop assembly. Both parts were on national backorder and not available until late December, so neither repair was done on this visit.

More Computer Diagnostics work at our Winter Haven shop

At our Winter Haven shop

15 computer diagnostics jobs at our Winter Haven shop in the last 90 days.

FAQ

Computer Diagnostics in Winter Haven: questions answered

Answered by our technicians serving Winter Haven.

Why do you charge for diagnosis when the parts store reads codes for free?

Because they're two different things. Reading a code takes a few seconds and tells you which system reported a fault. Finding the cause takes a technician, a lift, live data, and testing to prove which part in that system actually failed. That's the work you're paying for, and it's the part that keeps you from buying components that don't fix the car. Bring us the code you already have. It gives us a head start.

Does the diagnostic fee go toward the repair if I have you do the work?

That depends on the job, and the service advisor will lay it out at the counter before anything starts, so there are no surprises on the invoice. The bigger point is what the fee gets you either way: a confirmed cause with photos, and a quote based on the actual problem instead of a guess. Ask us when you drop the car off and we'll tell you exactly how it works for your repair.

How long does diagnosis take?

It depends on the symptom. Something that's failing right now in front of the technician can be pinned down quickly. An intermittent problem, a wiring fault, or a noise that only shows up cold takes longer, because we have to recreate the condition before we can test anything. We'll give you a time estimate up front and call you if what we find changes it. We'd rather tell you it's going to take a while than hand you a fast answer that's wrong.

What if you can't find the problem?

We'll tell you that plainly instead of picking a part and hoping. Usually it means the fault is intermittent and hasn't shown itself yet, and the next step is either leaving the car with us longer or bringing it back when the symptom is happening. You'll get everything we ruled out and how we ruled it out, which is real information even when it isn't the answer you wanted. If a job is beyond what we can test here, we'll say so rather than run up your bill.

Can you diagnose something another shop already worked on?

Yes, and we get that call a lot. We start from the car in front of us rather than from what's already been replaced, because assuming an earlier repair was right is how the same wrong answer gets repeated. Bring your paperwork if you have it. Knowing what's already been done and what changed afterward is genuinely useful. You'll get the same thing anyone else gets: a named cause, photos, and a quote, and no pressure about where you have the work done.

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ASE Certified Technicians

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20+ Years

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