Our 2006 honda odyssey lost acceleration/power and was towed?

Was towed. On first start now, it starts for 1 second and immediately turns off. On second start, it only whines like a flooding sound. The engine light is on. The van is stranded. Please let me know where to start. What do these symptoms mean? What are the signs of a bad egr valve? It it air or fuel intake? Spark plugs are fairly new. Starter is fairly new. Our budget is very small. Thank you.

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