Monday, February 23rd, 2015 AT 8:38 PM
2001 Pontiac Bonneville sle. Starts up on first start of the day. Then after driving I go to start again and it starts then stalls in a few seconds after turning key.I was getting a code 404. I replaced erg valve and maf sensor. Also Replaced fuel filter a few months ago. Every once in awhile I get a message saying check gas cap but I have put new one on. Im Not getting any codes. Starts just fine on the first start of day or long period of sitting ( several hours)any thoughts to this.

