When i try the remote start the car will start and turns right off within seconds. Any ideas?

2018 Civic EX

 

Going to need more info than that.

Factory or aftermarket? You installed, or someone else? Lights flashing? Car starts, like up to the point where it idles, or just cranks? Manual/automatic? Immobilizer light coming on? Factory key fob or aftermarket?

 

Factory, car is 2 days old. When you remote start the lights flash once then when it starts the flash 6 times then it shuts off.

 

Factory remote starts are funny man. Try sitting in the car and doing it. Notice if the locks work or not, and if the immobilizer light on the dash flashes. Not much more I can tell you other than take it back to the dealer. Make sure it's out of vallet mode, if that is an option on the factory system?