What a FIXD scan does

A FIXD scan reads the diagnostic codes your car's engine computer stores when something goes wrong. When your check engine light turns on, your car has already logged a specific problem — a misfire, an oxygen sensor failure, a catalytic converter issue. A FIXD scan retrieves that code and translates it into plain language so you know what the problem actually is, rather than just seeing a warning light.

The scan itself takes seconds. You plug a small FIXD device into the diagnostic port under your steering wheel (the same port a mechanic uses), open the FIXD app on your phone, and the device sends the stored codes to your phone. The app then shows you what each code means, how serious it is, and what repairs might cost at a shop near you.

The real value is that you get this information before you call a mechanic or a dealership. You know whether the problem is urgent or can wait, whether it's something you might fix yourself, and roughly what you should expect to pay. This shifts the conversation from "your car needs work" to "your car has this specific problem, and here's what I know about it."

Key Takeaways

  • A FIXD scan reads the diagnostic codes stored in your car's computer when the check engine light comes on, then translates them into plain language through an app.
  • The device plugs into the diagnostic port under your steering wheel and connects to your phone via Bluetooth, showing you the problem and estimated repair costs in seconds.
  • Knowing the actual code before you visit a mechanic helps you understand whether the problem is urgent, whether you can address it yourself, and what a fair repair price looks like.
  • FIXD also monitors your car continuously and alerts you to problems before the check engine light appears, so you can plan repairs rather than face emergencies.
  • The FIXD device is a one-time purchase, and the app is free; you pay nothing per scan or per month to use it.

How to use FIXD to read your check engine light

Start by purchasing a FIXD device from the FIXD website or from retailers like Amazon or Best Buy. The device itself costs between $20 and $30 depending on which model you choose. read the FIXD app to your phone (available on iOS and Android) and create an account.

Locate your car's diagnostic port. On most cars made after 1996, it's a rectangular socket under the steering wheel, usually on the left side of the dashboard. Plug the FIXD device in firmly — you'll hear or feel a click. Open the app and follow the prompts to connect via Bluetooth. The app will search for and retrieve any codes your car has stored.

Within seconds, you'll see each code displayed with a plain-language explanation. The app shows you the severity (critical, moderate, or minor), what system is affected, and what symptoms you might notice. It also pulls repair cost estimates from shops in your area, so you can see what local mechanics typically charge for that repair.

Understanding the codes FIXD shows you

Diagnostic codes follow a standard format that every mechanic and every scan tool uses. They start with a letter (P for powertrain, C for chassis, B for body, U for network) followed by four numbers. A code like P0300 means a random misfire in the engine. P0420 means the catalytic converter is not working efficiently. These codes are the same whether you scan with FIXD, a dealership scanner, or an independent shop's tool.

The FIXD app translates each code into what it actually means for your car and your wallet. It tells you whether the problem is something that will damage your engine if you ignore it (like a misfire or low oil pressure) or something that affects emissions or comfort but won't strand you (like a faulty oxygen sensor or a loose gas cap). This distinction matters because it tells you whether you need to stop driving or whether you can safely drive to a mechanic's shop.

The app also shows you whether the code is "pending" (the computer detected the problem once but hasn't confirmed it yet) or "confirmed" (the problem has happened multiple times). A pending code sometimes clears on its own after a few drive cycles. A confirmed code almost always needs attention.

What FIXD costs and what's included

The FIXD device is a one-time purchase between $20 and $30. Once you own it, you can scan your car as many times as you want at no additional cost. The app is free to read and use. You do not pay per scan, per month, or for any premium features to read your check engine light.

FIXD also offers a paid subscription called FIXD Premium, which costs around $10 per month or $60 per year. The premium version adds continuous monitoring (the device alerts you to problems before the check engine light appears), maintenance reminders, and detailed repair guides. For most people, the free version is enough to read codes when the light comes on. The premium version is useful if you want to catch small problems early or if you want step-by-step repair instructions.

Compare this to a dealership diagnostic scan, which typically costs $100 to $150 and tells you only what the dealership wants to tell you. An independent shop's scan is often free if you have them do the repair, but you pay for the diagnosis if you don't. FIXD gives you that diagnosis yourself, on your own schedule, for a device you keep forever.

When FIXD is most useful

FIXD is most useful the moment your check engine light turns on. Before you panic, before you call anyone, you can plug in the device and know exactly what the problem is. If the code is something minor (a loose gas cap, a small oxygen sensor issue), you might fix it yourself or decide it can wait. If the code is something serious (a misfire, a transmission problem), you know to get to a mechanic quickly.

FIXD is also useful if you're buying a used car and the check engine light is on. You can scan it before you make an offer, so you know whether you're looking at a $50 fix or a $2,000 repair. Some used car buyers bring a FIXD device to the lot specifically for this reason.

If you own an older car or a car you plan to keep for many years, FIXD Premium's continuous monitoring can help you catch problems early. The device monitors your car's systems even when you're not driving and sends you alerts if something starts to go wrong. This gives you time to plan a repair rather than having your car fail unexpectedly.

What FIXD cannot do

FIXD reads the codes your car's computer has stored, but it does not perform a full vehicle inspection. A code tells you that a sensor detected a problem, but it doesn't always tell you the root cause. For example, a P0300 code (random misfire) could mean a bad spark plug, a fuel injector problem, a vacuum leak, or a compression issue. FIXD will tell you the code and what it generally means, but a mechanic has to diagnose which of those problems is actually happening.

FIXD also cannot clear codes from your car's computer. Once you've read the code and understand the problem, you need a mechanic to fix it. Some scan tools let you clear codes yourself, but FIXD does not — which is actually a good thing, because clearing a code without fixing the problem just hides the issue until it comes back.

Finally, FIXD works only on cars made after 1996 that have the standard diagnostic port. Older cars, some luxury vehicles, and some commercial trucks use different diagnostic systems that FIXD cannot read.

Alternatives to FIXD

Other scan tools exist at different price points. Cheaper options like BlueDriver or Innova scan tools cost $25 to $50 and read codes the same way FIXD does, though their apps may be less polished. More expensive professional scanners ($200 to $500) give you more detailed information and can sometimes clear codes, but they're overkill for a home user who just wants to know what the check engine light means.

You can also take your car to an auto parts store like AutoZone or O'Reilly Auto Parts. Many of them scan your car for free and print out the code. This costs you nothing but your time, and you get the code on paper. The downside is that you don't get the app's explanations, repair cost estimates, or the ability to monitor your car over time.

A dealership or independent mechanic will scan your car as part of their diagnostic process, but you typically pay $100 to $150 for that service. If you plan to have them do the repair, the scan is often free or rolled into the repair cost. If you just want to know what the code is, paying for a dealership scan is expensive compared to owning a FIXD device.

Frequently Asked Questions

Will FIXD work on my car?

FIXD works on any car, truck, or SUV made in 1996 or later that has the standard OBD-II diagnostic port (the rectangular socket under your steering wheel). This covers the vast majority of vehicles on the road. Older cars, some high-end European vehicles, and commercial trucks may use different systems. Check the FIXD website or app to confirm your vehicle before you buy.

Can I clear the check engine light myself with FIXD?

No. FIXD reads codes but does not clear them. Once you understand what the code means, you need to fix the underlying problem. A mechanic can clear the code after the repair is done. Some other scan tools let you clear codes yourself, but FIXD intentionally does not, because clearing a code without fixing the problem just hides the issue.

Does FIXD tell me the exact repair cost?

FIXD shows you estimated repair costs based on what shops in your area typically charge for that repair. These are estimates, not quotes. The actual cost depends on your specific car, the shop you choose, and whether there are related problems the initial scan didn't catch. Use the estimates to know the ballpark, then call shops for actual quotes.

What's the difference between FIXD and taking my car to a mechanic?

FIXD tells you what the diagnostic code is and what it generally means. A mechanic uses that code as a starting point, then performs additional tests to pinpoint the exact cause and fix it. FIXD is the first step — it answers "what is my car telling me?" A mechanic answers "what do I need to do about it?" You need both, but FIXD lets you understand the problem before you pay for a diagnosis.

Do I need the paid FIXD Premium subscription?

No. The free version reads codes and shows repair estimates, which is enough for most people. Premium adds continuous monitoring and maintenance reminders, which is useful if you want to catch problems early or if you want detailed repair guides. Start with the free version and upgrade only if you find you need those features.