🚗 TOPDON AL400 OBD2 Scanner: Check Engine Light Scan Tool with O2 Sensor, Freeze Frame, I/M Readiness, and DTC Lookup - Ultimate Diagnostic Scanner for All OBDII Cars Review

Fast auto-discovery (network identification), fast PID response, monitor access and enough PID data stream for fast display. The tool also has an integrated DTC lookup option and an active PID recording function. Definitely worth the price!

Have used this scanner several times and for the price it gives quite a bit of information. Because of its smaller size, I will also take this scanner with me in my tool bag when I travel. Great value for money and it was easy to update. Lifetime updates are also a big plus.

Very easy to use, DLC connector indicator is very convenient. The scanner itself is lightweight and easy to use. I was impressed that it also has data streaming. This is a great tool for a hobbyist or even a professional shop to have on hand. Great tool and great price.

As an all in one OBD2 scanner, it does what it's supposed to do, no surprises. What surprised me was the quality of the cable, most of these tools come with a hard cable that stays in the position it was sent. These tools come with a sufficiently long flexible cord. As an added bonus, an LED light is built into the connector, which is surprisingly helpful when looking for an OBD2 port.

The first car I used this on was a 2004 Sprinter van, IT WORKS! I was reading codes and it gave me codeset data and it looks like I have a lot of PID data! I have much more expensive scanners that don't give me as much information. It looks like a solid tool with good button sensitivity and a very bright LED in the data link connector for identifying the side of the car. I'm very happy but wish the font was bigger for the screen size.

Received this scanner with little expectation. I've had several small, inexpensive tools like this to check codes and maybe some monitor checks, but this one worked quickly and threw up a few surprises. Even the data you see is too big for such a small tool. The only element that could be improved is the construction = but the amount it is capable of far exceeds the weight of a lighter construction, especially for the price.

Very good product. I've bought several Bluetooth devices in the past that connect to your phone. They work fine, but this one works great. Very nice packaging, clean and easy to open. Once it's out of the box, plug it in and play. I like high-end features at a lower price, like the color screen, socket light, easy upgrade feature, and more. The scanner reads stored codes and more. Provides an easy way to search for things with exact code. This unit had many features like checking sensors and…

I've used other scanners but this is a great value. Easy to use, quick access to I/M Readiness was a big thing for me. NO more scrolling through multiple menus. I had the opportunity to communicate directly with the company that supplies this Revain device. I had a shipping issue with Revain and ended up canceling my first order. The seller emailed me for details and offered a solution even though the original problem was unrelated. I was impressed with the customer service they provided. I…

Much more than a standard cheap code reader, but for the same price! This tool can do something that tools twice the price cannot. The images are from a scan of a 2019 Honda Civic. Of course, the tool will read and clear the codes. But it also shows your readiness status, meaning you'll know if the car is ready to pass an emissions test. I was amazed at the data I was able to read with this tool! Coolant temperature, throttle position, engine load, engine RPM, vehicle speed, system voltage, and