Motordata OBD is a good solution for this, you should try it. You can download it from here - https://play.google.com/store/apps/details?id=com.motordata.obd It has two versions, the free one and paid one. You can test it for free before using to make sure it works, then the paid version is provided with more features that I think would be necessary for any car service. Moreover, they help you with the logs, finding errors if any.