Service Engine Soon light on on 2001 Buick Park Avenue

Came on while I was driving. Car lost compression and light is blinking and staying on. Starts blinking while I'm driving, constant when car is idleing. Any guesses at what it could be?

Asked by for the 2001 Buick Park Avenue
1 answer
cruise on over to your local advance auto or auto zone.they have obd2 scanners and will check your codes for free.