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5 Best Car Diagnostic Tools to Avoid Costly Mechanic Bills

American Motors Review Team
Written By American Motors Review Team
Last updated: Jan 22, 2025, 04:47 AM
Affiliate Disclosure ↓

You’re on the highway. And your car’s engine light suddenly comes on. Panic sets in, and you’re left wondering what the problem could be. Is it something minor or a costly repair? You need answers but don’t want to shell out money for a mechanic just yet.

A mechanic using the MOTOPOWER Car Diagnostic Tool while looking under the hood of a car.

Car diagnostic tools can save you time and money by helping you identify the root cause of an issue

We’ve all been there. That sudden dread when the engine light pops up on your dashboard. You start imagining worst-case scenarios. Is it a loose gas cap? Or something major that’ll cost a fortune to fix? It’s stressful not knowing what’s going on under the hood.

But here’s the good news: a diagnostic tool can put you in control. Moreover, the MOTOPOWER Car Diagnostic Tool will give you insights into what’s happening with your vehicle, all without needing a trip to the mechanic. In short, it pinpoints what’s triggering that worrying light. You’ll know if you can keep driving or need to pull over. We voted it best overall out of five popular diagnostic tools. Curious about the runner-up? Find out which brand took this spot below and why!

View all Contents
  • Choosing the Best Car Diagnostic Tool: A User's Guide
    • With a Car Diagnostic Tool, You Won’t Need to Pay a Professional to Tell You Something You Can Fix Quickly
    • My Personal Picks
    • What You Need to Consider When Choosing a Car Diagnostic Tool
  • Car Diagnostic Tool FAQs
  • Why Trust Us?
  • Contributors
  • Related Reviews

Our Top Picks

  • MOTOPOWER Car Diagnostic Tool: Best Overall (Shop Now) →
    Read more about this car diagnostic tool ↓
  • FOXWELL Car Diagnostic Tool: Runner-Up (Shop Now) →
    Read more about this car diagnostic tool ↓
  • ANCEL Car Diagnostic Tool: Most Durable (Shop Now) →
    Read more about this car diagnostic tool ↓
  • LAUNCH Car Diagnostic Tool: Most Compact (Shop Now) →
    Read more about this car diagnostic tool ↓
  • Autel Car Diagnostic Tool: Most User-Friendly (Shop Now) →
    Read more about this car diagnostic tool ↓

5 Best Car Diagnostic Tools of 2025

MOTOPOWER Car Diagnostic Tool

Best Overall
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Picture this: you’re planning a road trip, and you want to ensure everything’s running smoothly. Instead of guessing or hoping for the best, you can use the MOTOPOWER Car Diagnostic Tool to check your car’s health before hitting the road. It’s like having a mini mechanic in your glove compartment. It connects directly to your car’s onboard computer and can tell you if it’s a minor issue like a loose gas cap or something more serious.

One of the best things: it doesn’t just stop at reading error codes. It has a built-in library to help you understand what those codes mean, which can be a lifesaver when you’re trying to figure out whether you need to make an urgent repair or if it can wait. Plus, it gives you real-time data on your car’s performance, like speed, engine temperature, and engine speed.

What Motorists Value
  • 4.6-star rating—7k sold this month
  • Provides real-time vehicle performance data
  • Wide compatibility with most cars
  • Easy to use, even for non-experts
  • No batteries or chargers are needed
  • Supports multiple languages
What to Note
  • Only checks engine issues, not ABS or airbag problems

FOXWELL Car Diagnostic Tool

Runner-Up
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Would you like a mini mechanic with 50 years of experience living in your glove compartment? The FOXWELL Car Diagnostic Tool is for serious car diagnostics. Essentially, our runner-up is perfect for those who want to tackle complex car issues head-on. This is because it has features that let you dive deep into car problems without needing a professional.

In short, this diagnostic tool has over 30 reset functions, like injector coding and ABS bleeding. This means you can do more than just basic checks; you can dive into specific repairs and maintenance tasks. It also scans every system in your car, providing insights similar to what you’d get from a dealership. This is a major upgrade compared to the MOTOPOWER, which is focused on engine diagnostics and basic functions. Moreover, the 7-inch HD touchscreen of the FOXWELL makes it easy to navigate all the functions, showing you what’s going on with your car in detail.

What Motorists Value
  • Supports over 30 advanced reset functions
  • Wireless diagnostics up to 33 feet away
  • Easy-to-use 7-inch HD touchscreen
  • Three years of free software updates
What to Note
  • Pricey (but it’s like having a mechanic on call!)

ANCEL Car Diagnostic Tool

Most Durable
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Do you like black? Prefer black to yellow? The ANCEL Car Diagnostic Tool is the most comparable in specs and price to the best overall. In fact, it also has a 4.6-star rating and (as of this writing) is basically the same price as the best overall. In short, this tool is great for those who just want to quickly figure out what’s causing that pesky engine light without breaking the bank. It plugs directly into your car’s OBDII port, powers up instantly, and lets you read and clear engine trouble codes in seconds.

Now, let’s compare it to our best overall and runner-up. The FOXWELL is a high-end, wireless tool with advanced features like bi-directional control and over 30 reset functions. This diagnostic tool, on the other hand, is more basic. But that’s not necessarily a downside—it’s all about what you need. Compared to the best overall, this scanner offers similar functionality. Both tools are great for basic engine diagnostics, but this scanner is slightly more rugged and has a bigger screen. In short, this diagnostic tool strikes a nice balance between ease of use, durability, and affordability.

What Motorists Value
  • 4.6-star rating
  • Black color hides dirt and grime
  • Easy plug-and-play functionality
  • No need for batteries or chargers
What to Note
  • Limited to engine diagnostics only (no ABS or airbag support)

LAUNCH Car Diagnostic Tool

Most Compact
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The LAUNCH Car Diagnostic Tool sold over 1,000 units this month and 68 percent of customers give it a five-star rating. In other words, 8,740 people give it a 100 percent rating! In short, it will give you a clear picture of your car’s health without costing an arm and a leg. “How does it compare to the ANCEL and MOTOPOWER?” I hear you ask. It has O2 sensor tests to ensure fuel efficiency, EVAP system tests to prevent gas fume leaks, and I/M Readiness checks to confirm your car is ready for emissions testing. Are these features important to you?

Moreover, with a built-in DTC lookup library, you don’t have to waste time Googling what those error codes mean—you’ll have the answers right at your fingertips. In a nutshell, this diagnostic tool is perfect for drivers who want a little more insight into their car’s condition. It’s reliable, easy to use, and comes with lifetime free updates.

What Motorists Value
  • Built-in DTC lookup library for diagnostic codes
  • Supports O2 sensor and EVAP system tests
  • Lifetime free updates for continuous use
  • Affordable yet feature-rich
What to Note
  • Smaller screen compared to other models

Autel Car Diagnostic Tool

Most User-Friendly
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Like red? How about a more intuitive user interface? Our final scanner has a 4.6-star rating and sold 2,000+ units this month. Like the other readers on our list, the Autel Car Diagnostic Tool reads and clears diagnostic trouble codes and displays live data, helping you understand the exact cause of the engine light. It also offers a convenient one-click I/M Readiness check, which quickly tells you if your car is ready for an emissions test.

Compared to the LAUNCH Creader, ANCEL, and MOTOPOWER, this tool similarly focuses on basic engine diagnostics but stands out with its more intuitive user interface. It has a color display and built-in speaker, enhancing the user experience with clearer visuals and audio cues. In short, this pick is a reliable and straightforward diagnostic tool, perfect for those who need a quick and easy way to diagnose and clear engine faults.

What Motorists Value
  • 4.6-star rating—2,000+ units sold this month
  • Intuitive user interface: color display and built-in speaker
  • Supports multiple languages for global use
  • Lifetime free updates included
What to Note
  • Roughly $10 more than best overall (but with the added benefit of a more intuitive user interface!)

Choosing the Best Car Diagnostic Tool: A User's Guide

With a Car Diagnostic Tool, You Won’t Need to Pay a Professional to Tell You Something You Can Fix Quickly

A Personal Story: My Engine Light Drama Solved in Minutes

I was driving in town last week, and suddenly, my engine light came on out of nowhere. I immediately started worrying about what could be wrong. Was it serious? Would I need to take my car to a mechanic and end up with a huge bill?

Instead of rushing to a nearby mechanic, I called my friend who has been working on cars since he was six (we all have a friend like this, don’t we?). He showed up with his diagnostic tool and within minutes, figured out that two ignition coils were the issue. The next day, he replaced them, and just like that, the problem was solved. No expensive mechanic bill, no leaving my car overnight—just a quick fix, and I was back on the road.

This is where scanners really shine. Moreover, the MOTOPOWER Car Diagnostic Tool could be all you need to avoid those big, unexpected bills and keep your car running smoothly.

My Personal Picks

1. MOTOPOWER Car Diagnostic Tool

Best Overall Car Diagnostic Tool for Real-Time Data on Your Car’s Performance

Here’s a Quick Look at the MOTOPOWER:

Car Scanner Code Reader How To

Why Choose It?

  • Accurately reads and clears engine trouble codes
  • 75% of customers give it a 5-star rating
  • Easy to use, even for beginners
  • Reliable brand with a strong reputation
  • Great value for money with multiple diagnostic features
  • Voted “best overall” car diagnostic tool by American Motors Review Team

2. FOXWELL Car Diagnostic Tool

Best Car Diagnostic Tool for Advanced Diagnostics

The FOXWELL Car Diagnostic Tool sold on Amazon

Image courtesy of FOXWELL

Why Choose It?

  • Performs comprehensive diagnostics on all car systems
  • 58% of customers give it a 5-star rating
  • Advanced features with bi-directional control
  • Trustworthy brand with a proven track record
  • Excellent value with extensive reset functions
  • Voted “runner-up” by American Motors Review Team

What You Need to Consider When Choosing a Car Diagnostic Tool

1. Compatibility

Imagine plugging in a tool only to find out it’s not compatible with your vehicle. This is what happened to my friend. The mechanic who came to her home to fix her vehicle brought a scanner that didn’t fit the plug-in point in her car. He had to travel back to his workshop to get another car diagnostic tool. Thankfully, the MOTOPOWER Car Diagnostic Tool is a solid choice if you have a car made after 1996, covering most vehicles you’re likely to encounter.

2. Easy to Use

Let’s be honest—nobody wants to wrestle with a complicated tool, especially if you’re not a car expert. The MOTOPOWER Car Diagnostic Tool is straightforward and perfect for quick, basic checks. On the other hand, the FOXWELL Diagnostic Tool, while more advanced, is still user-friendly, with a large touchscreen that makes navigating through its features easy.

3. Diagnostic Capabilities

Basic tools like the MOTOPOWER Car Diagnostic Tool are great for reading engine codes, but what if the problem lies elsewhere? That’s where the FOXWELL shines. It can scan all the systems in your car, offering a deep dive into potential issues, whether it’s your ABS, airbag system, or something else. It’s the go-to choice when you need advanced diagnostics.

4. Real-Time Data

When you’re trying to diagnose an issue, real-time data is vital. The MOTOPOWER gives you live data, which is crucial for tracking how your car’s performing as you drive. However, the FOXWELL Diagnostic Tool takes it further, offering more detailed data across all your car’s systems, giving you a clearer picture of what’s going on under the hood.

5. Do You Need Advanced Functionality?

The FOXWELL Diagnostic Tool offers advanced features like bi-directional control, letting you interact directly with your car’s systems—a feature that’s missing in more basic diagnostic tools.

6. Price and Features Balance

Let’s talk about the budget. The MOTOPOWER Car Diagnostic Tool offers fantastic value for basic diagnostics without breaking the bank. But if you’re looking for something with more depth, the FOXWELL Diagnostic Tool, though pricier, is worth every penny for its advanced diagnostics. Ultimately, it’s all about balancing what you need with what you’re willing to spend.

Car Diagnostic Tool FAQs

When would you choose the FOXWELL Diagnostic Tool over the MOTOPOWER?

You’d choose the FOXWELL over the MOTOPOWER if you need more in-depth diagnostics across all your car’s systems, not just the engine. It’s perfect for those who want advanced features like bi-directional control and detailed real-time data.

How can a car diagnostic tool help me save money?

A car scanner helps you save money by letting you identify issues with your vehicle before they become major problems. Instead of paying a mechanic just to diagnose the problem, you can do it yourself at home, which means fewer trips to the shop and avoiding unnecessary repairs. Plus, catching issues early can prevent costly breakdowns down the road. Personally, I believe every driver should have three essential tools: a GPS tracker, a car diagnostic tool, and a dash camera.

How does a car diagnostic tool help me in an emergency?

A car scanner can be a lifesaver in an emergency, like when your engine light suddenly comes on, just like it did for me. Instead of panicking and rushing to a mechanic, you can quickly use the tool to find out what's wrong, which is exactly what my friend did. By diagnosing the issue on the spot, we realized it was just a couple of ignition coils that needed replacing, saving me time, stress, and a potentially hefty repair bill.

What is the most affordable car diagnostic tool?

The most affordable car diagnostic tool on the market is typically something like the MOTOPOWER. It’s budget-friendly and great for basic engine diagnostics, allowing you to read and clear error codes without spending a lot of money. It's perfect for everyday drivers who want to keep track of their car's health without breaking the bank.

Contributors

American Motors Review Team
American Motors Review Team
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