OBD-II Trouble Code Reader
344854
The price for the useful tool was the best, and it performed perfectly.  The included code library loaded quickly and contained all the information I needed.
711452
One word summarizes it all - simple. The CodeScout is an extremely well versed code scanner that provides you with written code explanation and an extra long OBD2 cable. Overall, it's one of the best I've used.
663361
Tried it on my 2008 Mini Cooper S. Service engine light is on, code reader says "no codes". Won't erase service engine light.
1773246
Windows software recognized the scanner but was unable to communicate with it. Tried different software, USB ports even two different laptops but still no luck. There are a lot of similar products sold on Amazon (Wifi, Bluetooth or USB interfaces) and lots of people got the same problem. If you're looking for a USB interface OBD II scanner, go with ScanTool OBDLink SX. It's slightly more expensive (around $30) but it's totally worth it. Better quality cable, nice bundled software plus three years of warranty.
119287
Bought this to read the ABS codes on my '02 explorer which is on Actron's list of compatible vehicles. It will not recognize the ABS system. I called Actron and they blamed it on my vehicle. I tried it on my neighbors same year, model Explorer and got the same results. In reading other reviews this is a common problem. I gave 2 stars because it does read engine codes fine however I have no engine issues. 5 stars to Amazon for their great return policy.
532905
Bought it for an ABS issue in my Saturn. It could not read these codes, so I had to return it. Was told that a software change request was put in to  fix it, but I could not wait.
4264116
Error code on e60 bmw. Save your money as they are not bright anyways.
3997144
I was sent a returned unit that was defective so pretty poor quality controls here. The backlight of the screen would come on when connected to the OBD2 port but unit would not boot or display any data.
4944395
Continues to throw error code after a few miles. Returned. And this is the downstream not upstream.

Edit: Still getting the same error light/code from the second replacement sensor, I cannot definitively say the sensor did not work and the problem may lie elsewhere in the wiring or computer.
2625557
Will tell you what's wrong but will not clear codes after the problem is fixed example my brother left the gas cap off and didn't tell me so now I am stuck with a check engine light
(I bought direct from car md not through amazon)
1101862
Hi car me is a decent device but I don't think I'll b buying another one unless the update it with what the codes mean so I don't have to go online and search obd 2 codes
2814762
The unit would not read my cars codes, both GM cars. I contacted the manufacture and was given the run around. They suggested I buy their 600 dollar unit.
 The code reader was returned
2353482
This is handy to have. I like the fact that it works with OBD 1 & OBD 2, but the OBD 1 is very squirrelly. I don't trust many readings in the OBD 1 readouts. I may have bought parts for the car that I didn't need because of this. Actron needs to correct this, but I doubt that they will. I tried it on a friends 1994-95 Chevy van and it never would communicate with the ECM. It was initially hard to connect to the ECM on my wives 2005 Suzuki Forenza. My 1980 (OBD 1) Buick worked to a point, but made the repair time long. I was questioning everything I was troubleshooting. It did help make a quick repair on the Suzuki though.
1524273
Bought two of these to replace the two upstream O2 sensors for my 2002 ZR2 S10 V6 Chev pickup to fix P0135 and P0155 codes.  Didn't fix the problem.  Both sides still got codes.  After spending tons of $ replacing any other parts it could be including the ECU, I replaced the Bosch O2 sensors with a pair of "A C Delco 213-802 GM Original Equipment Heated Oxygen Sensors".  Fixed the problem!  Even though the Bosch sensor is specified as being correct for my vehicle and the connector fit perfectly, they did not work.
2737172
I wanted to read my Check Engine codes but it won't connect to the phone or tablet.
It may worth spending more and get a better OBD Adapter.
2187691
I had a cable style OBD II reader for my iPhone that quit working. I had paid $100 for it several years ago and was glad to find an affordable wifi code reader. So far it's working great.
3694314
All it does is read the code, which I can get done for free at any auto parts store. Doesn't help you figure out what the root problem is.