It could be so many things and you don't give much information. Does it turn over, make any noises?
Battery stolen.
Battery flat.
Anti-Theft system activated.
Fuses blown
Starter failed.
Starter relay failed.
Faulty ignition switch.
Any of the sensors.
Check for Diagnostic Trouble Codes by connecting a scan tool
https://www.google.com/search?q=mobile+auto+electrician+near+me
..
×