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Johnny's AutomotiveJohnny's Automotive
Haines City, FL

Computer Diagnostics at our Haines City shop

Bring it to our Haines City 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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Haines City, FL31600 U.S. 27Book a time online
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Where to find our Haines City shop

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

Address

31600 U.S. 27
Haines City, FL 33844

Shop phone

(863) 422-2995

Hours

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
Options

Computer Diagnostics options in Haines City

Choose the right computer diagnostics service for your needs.

Check Engine Light

Check engine light on? We pinpoint the exact cause with advanced diagnostics and provide clear repair options — no guesswork.

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Pre-Purchase Inspection

Buying a used car? Our thorough multi-point inspection uncovers hidden problems so you can buy with confidence.

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Vehicle Inspection

Vehicle Inspection evaluates relevant vehicle systems and documents findings for repair planning.

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No Start Diagnosis

No Start Diagnosis evaluates relevant vehicle systems and documents findings for repair planning.

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Electrical Diagnosis

Electrical Diagnosis evaluates relevant vehicle systems and documents findings for repair planning.

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Charging System Diagnosis

Charging System Diagnosis evaluates relevant vehicle systems and documents findings for repair planning.

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Overheating Diagnosis

Overheating Diagnosis evaluates relevant vehicle systems and documents findings for repair planning.

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Brake Noise Diagnosis

Brake Noise Diagnosis evaluates relevant vehicle systems and documents findings for repair planning.

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Suspension Noise Diagnosis

Suspension Noise Diagnosis evaluates relevant vehicle systems and documents findings for repair planning.

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Steering Problem Diagnosis

Steering Problem Diagnosis evaluates relevant vehicle systems and documents findings for repair planning.

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AC Diagnosis

AC Diagnosis evaluates relevant vehicle systems and documents findings for repair planning.

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Vibration Diagnosis

Vibration Diagnosis evaluates relevant vehicle systems and documents findings for repair planning.

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Fluid Leak Diagnosis

Fluid Leak Diagnosis evaluates relevant vehicle systems and documents findings for repair planning.

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Recent Computer Diagnostics Work in Haines City

Real jobs completed by our team in the Haines City area

Our team

Our Team

September 2026

What Caused the No-Start Condition in My Car?

What the customer reported

The vehicle was towed in because it wouldn't start, and the check engine light was on. The owner had already replaced the starter, suspecting it was the issue.

What we found and did

The technician found that the starting point fuse in the battery fuse block under the hood was blown, resulting in no power to the starter. The technician removed and replaced the necessary components to access and install a new starting point fuse in the battery fuse block. After replacing the fuse, the technician retested the system to verify the repair and performed a final road test to ensure everything was functioning properly.

Result

The vehicle started successfully, and the check engine light was no longer illuminated.

Pro Tip

A blown fuse can prevent your car from starting and may trigger a check engine light. If your car won't start, check the fuses first before replacing major components like the starter.

Our team

Our Team

September 2026

What Caused the Washer Fluid Leak Before Reaching Sprayer?

What the customer reported

The vehicle owner noticed that the washer fluid was leaking out before it could reach the sprayer.

What we found and did

The technician found that the windshield washer fluid reservoir was leaking. The team at our Haines City shop removed and replaced the windshield washer fluid reservoir and pump. They ensured all components were properly installed and made necessary adjustments. Additional fluids were added to complete the service, followed by a retest to verify the repair.

Result

The washer fluid system was restored to full functionality, ensuring the fluid reached the sprayer as intended.

Pro Tip

If your washer fluid leaks before reaching the sprayer, it might be a reservoir issue. Replacing the reservoir when leaks are detected can prevent further damage and ensure clear visibility during adverse weather.

Our team

Our Team

September 2026

What Caused the Hesitation During Acceleration?

What the customer reported

The customer reported that the check engine light came on shortly after purchasing the vehicle and noticed hesitation during acceleration.

What we found and did

The technician found that the crankcase breather hoses and air intake silencer chamber connectors were leaking, and the hose was taped together, which affected the vehicle's performance. The team removed and replaced the faulty crankcase breather hoses and air intake silencer chamber. They ensured all components were properly installed and performed a retest to verify the repair. A final road test confirmed the issue was resolved.

Result

The vehicle's acceleration hesitation was eliminated, and the check engine light was no longer illuminated.

Pro Tip

If your vehicle hesitates during acceleration, it might be due to a leaking hose or connector. Addressing these issues early can prevent more costly repairs down the line.

Our team

Our Team

September 2026

What Caused the Check Engine Light to Illuminate?

What the customer reported

The vehicle owner noticed that the check engine light came on last Thursday, although the car was not driving any differently.

What we found and did

The technician discovered that the Active Grille Shutter B Lower was causing the check engine light to illuminate and the fans to run on high. The team at our Haines City shop removed and replaced the necessary components to access and install the new Active Grille Shutter B Lower. They ensured all required fluids were topped off and performed a retest to verify the repair. A final road test confirmed the issue was resolved.

Result

The check engine light was successfully turned off, and the vehicle's cooling system returned to normal operation.

Pro Tip

If your check engine light comes on without noticeable driving issues, it may be related to components like the active grille shutter. Addressing it promptly can prevent further complications and maintain optimal engine performance.

FAQ

Computer Diagnostics in Haines City: questions answered

Answered by our licensed technicians serving Haines City.

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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20+ Years

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