This document appears to be a thesis submitted by five students (Uttam S Sharma, M.Dhanesh kumar, T.Akshay kumar, S.Akash) to Sriram Engineering College in partial fulfillment of a Bachelor of Engineering degree in Automobile Engineering. The thesis presents the implementation of a simple remote diagnostic system for vehicle defects using a client-server application over mobile phone communication. The system monitors sensor operations using a microcontroller programmed to send error messages via GSM to the user's phone.