Engine quits around corners and when not accelerating. on 2006 Ford F-250 Super Duty

My 2009 Super Duty starts and runs fine. However when slowing down around corners the engine will die. I took it to the Firestone for a Diagnostic test. They said that it could be my ignition coil or the sensor. What else could it be?

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2 answers
sounds like a faulty alternator or broken vacuum line to the pcv.
What were the code numbers from the diag. scan?