ignition on 2002 Dodge Ram 1500

Sometimes my truck will not stay started after i turn over the ignition, what can the problem be?

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2 answers
cam shaft sensor or crank shaft sensor, do code diagnostics testing yourself, its easy save money. bigggcat63@yahoo.com, mine had a code reading of p 340 which was the cam shaft position sensor
Could be many things, the best thing is to perform a diagnosis of the fuel management system. Check diagnostic codes, fuel mixture settings, vacuum leaks and fuel pressure to start with.