Check Engine is a free Android application developed by Vizorg Apps that serves as one of the largest directories for OBD-II errors. It contains a guide to virtually any error obtained through the scanner, simply by typing in the error and getting the transcript. The program is translated in more than 96% of the errors in the Russian language. The guide includes decoding errors in all control units (B, C, P, U), as well as a transcript of errors from standard on-board computers in the format of 33 orfor example, BMW vehicles).

Moreover, the application allows users to send errors to their friends through the "Send" button conveniently located below the error. Check Engine works without the Internet, and it even provides descriptions of region codes, which can be useful for identifying the origin country of a car. The database contains errors for various car brands, such as Acura, Audi, BMW, Chevrolet, and many more. Additionally, the developers promise to add new car brands to the database in the near future. If you know an error that's not in their database, you can email them to add it in the near update. Overall, Check Engine is a must-have application for those who want to have a comprehensive guide to OBD-II errors in their pocket.