Top positive review
Impressive Entry-Level Scanner with Advanced Features – Great Value
By JF on Reviewed in the United States on May 31, 2025
This review is for the Xtool AD20 Pro, a compact, wireless, dongle-style OBD2 scanner that transforms your smartphone into a full-featured diagnostic tool. At around $55, this is an exceptional entry-level scanner that punches well above its weight class in terms of features and functionality. I own several Xtool products, including the A30M (a more advanced wireless scanner priced around $160 with no subscription required) and the D7S, a professional-grade wired scanner that does require an annual subscription. The AD20 Pro sits at the entry point of their lineup, but don’t let that fool you, this tool delivers surprisingly advanced diagnostics for its price. The AD20 Pro supports a wide range of vehicles. I have successfully used it on a 2014 Jeep and a 2011 Suburban. When connected to a new vehicle, the app will prompt you to download the specific diagnostics for that make and model, simple and efficient. Once connected, it performs an All-System Scan, reading and clearing fault codes across systems including Engine, Powertrain, SRS, ABS, TPMS, and more. It easily handles diagnostics that most cheaper tools miss. Additionally, it includes valuable features like Oil Light Reset and Battery Check, which are frequently used maintenance functions. A good convenience is its built-in DTC Lookup, which pulls up definitions online for any fault codes, helpful for understanding and addressing issues quickly. Other features include: Live data streaming, Freeze frame data, ECU info, O2 sensor, component testing, engine load, RPM, fuel trims, MAF, misfire counters, voltage, and more. What you will not get at this level are the bi-directional controls and advanced reporting features (like saving and printing diagnostic histories), which are available on models like the A30M and D7S. But that is a fair trade-off considering the ease of use and price point. Bottom line: The Xtool AD20 Pro is a very good value for beginners or DIYers who want more than just basic code reading. It is a great starting point with plenty of features typically found only in more expensive models. Highly recommended for anyone looking for a reliable, feature-rich OBD2 scanner at an entry-level price.
Top critical review
15 people found this helpful
Astonishingly bad. Expected great, received awful.
By Joe Sevy on Reviewed in the United States on December 3, 2023
I expected this scanner to be at the very least an improvement over the elm327 BAFX unit I was using with Torque Pro. Wrong. In order for this to be more useless it would have to actually decrease my knowledge of what my engine is doing! There is nothing, and I cannot stress this strongly enough, absolutely nothing this thing can do that a cheap elm327 unit coupled with Torque won't do faster and better. This thing is garbage. An anti-product of no value to any normal person, perhaps even less than no value since if this was the first scan-tool you ever had you might be tempted to imagine it was telling you something you couldn't know without it. Edit: XTOOL contacted me to make a bad situation even worse, asking if I'd downloaded the app. Now, of course without the app you couldn't get any results at all, which might actually be an improvement, considering you'd probably quit trying to get something useful out of it It's sad that "Lisa" was obviously trying to be helpful without realizing that if my issue was with being unable to download the app I'd have complained I couldn't download the app rather than complaining about how badly the device performed. While unintentional, that's just insulting. That said, I suppose I should give a few words about the app itself. Unlike Torque, it's badly designed, intended for people who have no idea what information you'd need to work on a car. The custom dashboards seem like a great idea until you find out you'd need a phone twice the size of mine before they'd actually be useful to drive with. By contrast, Torque allows you to set up custom displays of whatever live data you want, however you want to display it, whether in graph, metric, dial gauge. And, while we're updating the review, let's spend a moment talking about the design of the obd2 unit itself. It's small and rounded, which is fine if you intend to plug it in and never remove it. But if you'd like to remove it it's extremely difficult to get enough grip on it to pull it out.
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