Book Nissan computer diagnostics at our Lake Wales shop. Same technicians, same bays, every time you come in.
323 North Scenic Highway, Lake Wales, FL 33853
Monday to Friday, 7:30 AM to 5:30 PM
When a scan tool pulls a stored code off your car, what comes back is a number and a short description: a lean condition, a misfire on cylinder three, a circuit reading out of range. That tells us where the car noticed something wrong. It doesn't tell us what caused it. One lean code can come from a vacuum leak, a tired fuel pump, a dirty mass airflow sensor, or an exhaust leak sitting upstream of a sensor. Replacing the part named in the description works out sometimes. When it doesn't, you've bought a part and you still have the problem.
So the code is where we start, not where we stop. From there a technician watches live data while the engine runs, compares those readings against what the manufacturer says they should be, and tests the actual circuit or component with a meter, a scope, a pressure gauge, or a smoke machine. Sometimes it means driving the car until the fault shows itself. That testing is what turns a system into a part, and it's why diagnosis takes real time. It's skilled labor with real equipment behind it, the same as any other job in the shop, which is why it gets billed like one.
A free code pull at a parts counter is a useful thing to have. It tells you a code is stored and roughly what system it lives in, which is more than the dashboard gives you, and it costs you nothing. It's a starting point. What it isn't is a diagnosis, because nobody put the car on a lift, watched it run, or tested anything. If you already have the code, bring it. We'll use it. We'll just keep going from there.
Here's what paying for diagnostic time actually buys you. A named cause, meaning the specific failure we found and how we confirmed it, not a system and not a maybe. Photos of it on your phone from the digital inspection, taken on your vehicle that day. And a quote to fix it. Whether you do that repair, with us or anywhere else, is a separate decision and it stays yours. Plenty of people take the answer and go think about it.
The math on this is simple. Diagnosis costs what it costs, once. Guessing costs a part at a time until something works, and none of those parts come back. That's what you're really protected from here: paying for repairs that don't fix anything. Whatever we do fix carries a 36 month, 36,000 mile nationwide warranty, and every one of our six shops works the same way.
The technician at our Lake Wales shop tested the vehicle for the overheating and coolant loss concern.
Read the full jobThe technician found valve cover gasket(s) with covers leaking, with the severity of the leaks calling for that repair to be the starting point, and the…
Read the full jobThe technician found the front brake pads were beyond usable life, at less than 3mm, which was flagged as a major safety concern.
Read the full jobThe technician found the front and rear brake pads were beyond usable life or less than 3mm, flagged as a major safety concern.
Read the full jobThe technician found the front pads and rotors were metal to metal, a serious safety concern that may cause caliper failure, and the rear pads were beyond…
Read the full jobThe technician found the system was low on freon, reading 0.00 lbs, and no leaks were found at that time.
Read the full job*Updated 5/22/26* First of all I have never in my 59 years ever had a good experience at a garage until today. I was greeted by Mike and Kevin in the Lake Wales Johnny's Automotive they were very cordial very friendly very professional and they just changed my thinking on mechanics and garages from a zero to a 10. I never thought spending a bunch of money would be such a good experience especially at a shop while I'm here to tell you if you need any work done I highly highly recommend when you go there to ask for either Kevin or Mike to assist you give you a quotes they even left a rose on my steering wheel how awesome is that God bless them and I will be back for sure thank you for an awesome experience guys. Edit: 4th visit and just as great as my 1st. Went in to get just a oil change. Went in had coffee while my car was being serviced. Mike Mgr. You won't find anyone any kinder, funny & professional than him. Customer service is impeccable !! Mike makes you feel like it's your first time every time. He knows the automotive business, he's super sharp that's for sure. Kevin is a awesome man too knows what he's talking about and made me feel welcome as always. Jerry: Thank you for taking great care of my Nissan Rogue Brother You guys at Johnny's Automotive in Lake Wales Rock !! Monday July 28th These guys at Johnny's Automotive are pure classy( Tried to take pictures of the 2 long stem roses that Mike gave me to give my wife.Sorry picture wouldnt post)you don't get roses at any other dealership new used or any garage that I am ever aware of. Thank you Mike Kevin and Jerry for your outstanding service once again you guys are awesome !! *Updated 5/22/26* ❤️🙏 If I could give Johnny’s Automotive 10 stars, I absolutely would! I cannot say enough great things about the incredible experience I had with them. They repaired the front end of my vehicle, fixed my air conditioner, and replaced my tires — and everything came out PERFECT. My car honestly drives and feels better than it has in years. From the moment I walked in, the customer service was top-tier. Everyone was friendly, professional, and genuinely cared about helping me. Their mechanics clearly know exactly what they’re doing because the quality of the work was outstanding, and they kept me updated throughout the entire process. But the real standout was the manager, Mike. Mike went above and beyond in every possible way. It’s rare these days to meet someone so personable, honest, and genuinely kind. He treated me like family instead of just another customer. He took the time to explain everything clearly, answered all my questions, and made sure I was comfortable every step of the way. You can tell he truly cares about both his customers and the reputation of Johnny’s Automotive. Finding an automotive shop you can fully trust is hard, but Johnny’s Automotive in Lake Wales absolutely earned my trust and my future business. If you need repairs, tires, AC work, or honestly anything automotive-related, this is the place to go. Huge thanks to Mike and the entire team for doing such an amazing job. Highly, highly recommended! Rebecca was also great took me home and picked me up via courtesy vehicle. Very friendly and super kind. These folks are one of a kind. You don’t get this kind of service at a dealership that’s for sure. I did not expect the extra mile they went. Professionally, Lifetime Customer Paul Vigna
Paul Vigna
Verified Google Review
Pick whichever one is easiest to drive to.
ASE Certified Technicians
ASE certified techs working on your vehicle
Flexible Drop-Off Hours
Convenient service options
20+ Years
2 decades of trusted service
