My van stalls a lot will a bad oil cooler cause this

Hello and thank you for using JustAnswer. My name is \*\*\*\*\* \*\*\*\*\* I will do my best to assist you. During this conversation you will be given an automated offer for a phone call. You may accept or decline that offer.I don’t personally offer this service so if you take this another tech may call I’m sorry that you’re having trouble with your vehicle. I will do my best to help you resolve them. Please understand that I do not know your knowledge or capabilities so I may need to ask questions to find out basic information to help solve your specific problem. My aim is to give you the best service possible and to help you. If you have any questions or concerns, please don’t hesitate to let me know. Sometimes it may take a moment for me to respond because I may have to look up information about your concern. I appreciate your patience and will provide responses as soon as possible. No an oil cooler will not cause a stalling issue. It will cause a bad leak and is very common with the 3.6 v6. A bad catalytic converter coud cause this though. If it is stopped up the engine can't breathe and will stall. Could be many other things though also. Crank sensor, fuel pump, wiring, PCM, ect.... only way to know is to have it on a scan tool when it happens and monitor some data to see what is happening.

Thanks for the information my van is currently at the dealership now and I'm confused as to why they can't find what's wrong

You are welcome glad to help. They probably can't duplicate it. Happens alot on cars but they just have to hook a scanner to it and drive it and make it act up and hope they capture what is going on.

At one time I had a code p0420 would that cause the constant stalling

That code is for a faulty catilytic converter, exhaust leak, faulty 02 sensor. It could cause stalling but the cat would have to be broken up and causing a restriction randomly and I just don't see that being the cause. It is probably a wiring issue. Here is what I would do. I would do a fuel pressure test with a gauge and drive it until it acts up and see if the fuel pressure drops. They are known for the fuel pump relay failing in the TIPM. This will check it.

Ok hopefully they do what you suggestedWithout me saying anything

Yea hopefully so but you could suggest it. Wont hurt.

Okay thanks