Stalls out while driving

Engine Performance problem
2000 Dodge Intrepid Automatic

While Driving the the car will just shut off, after a few mintues it will start right up as if nothin ever happened. The check ingine light comes on and stays on. When I took it to get it read the code that only shows up is a PO455 code was on it. So the mechanic replaced the fuel pump and a sensor. We got it back and drove great that day no problems, the next day same thing cut off while driving. What in the world could it be?

I have dodge intrepid 2000, with 2.7L engine and have that kind of problem. Engine sometimes shuts off while I drive and slow down, or engine shuts off when engine is on Idle and as I cranck it again it starts without any problem, but sometimes it will not start immediatly, I changed engine control module but did't help. I have no check lights on and diagnostic is not showing any malfunction. At the shop they can not diagnoze whats wrong with car. What can be wrong?

Thank you for answer, I would like to have repare manual but can't get on net becouse paypal does't work in my country. Is it posible to download from any website for free to figure out what's wrong with my car. It has 2.7L v6 dohc engine.

On 19 November, I took my car to a mechanic for an $29.00 oil change. A few hours later I received a call from the mechanic telling me a hose needed replacing and new spark plug. He stated if I went to an auto shop (AS) to get a new hose and spark plugs he wouldn"t charge me for labor I went to auto zone and bought parts nd dropped them off at the repair shop. Later I recieved a call and was told my car would be ready the next day. Because a mechanic got sick and they were short handed. Around closing the next day I retuned to the (AS) and was presented a bill for $328.00. I told the mechanic I didn't approved anything beyond a 100.00. He showed me the invoice for work he did. "Removed and replaced cover and upper hose intake gaskets and thermostat hosing, Remove and replaced spark plugs, repair tans hose and a PCV Elbow. I expressed my dissatisfaction and paid the bill. I went out to my car and turned the inigtion and the car wouldn't turn over. I gave ti a little gas and the ccar started. However, when I put it in drive and moved about a foot. The car cut off. I repeated the steps and got the same results. I called the mechanic over and asked him what did they do to my car. I never had to give my car gas to state it and certainly did not have the car cut off. They raised the hood on my car and repeated the steps I performed. Car still cut off. Both mechanics stated they didn't know what was wrong and asked me to leave the car overnight again. The next day was Thanksgiving so I told him I would return the day after and expected my car to operate as it did when I dropped it off on the 19th. My calls went unanswered and was given excuses i.E, the mechanic working on my cc ar was ill and would be in on Saturday. Monday morning I went the shop and my car was not ready. They were still trying to figure out what was wrong. I returned yesterday Tuesday evening and was told their was a wire spliced and put together by someone prior to me dropping off my car a week ago. They stated as a result the car's brain nedded to be replaced. A new brain for y car could run up to $800.00 new or $400.00 used. I told them I to do what they needed to do to have my car running. But I would not pay another penny more than what I had already paid. That's when the mechanic turned off the lights and started locking up the shop nd told me to come back tomorrow. Please tell me what I should I do.

How can you cut the engine light off of a 2000 dodge intrepid showing code P0601 when the car is running perfect?