I have a 2000 Honda Odyssey van. I changed the head gaskets and now I'm getting a P108 and P0336 code. What would cause this.

. P0108--MAP Circuit High Input. Did you re-attach the MAP Sensor connector?

. P0336--CKP Sensor Range/Performance. Did you disturb or damage the Crankshaft Position Sensor, when you reset the timing belt/chain?

Yes, I reattached the MAP sensor connector and didn't do anything with the crankshaft position sensor from the beginning. Is it possible the timing could be off and that's why Im getting the codes?

Yes, when you replace the head all of the timing marks need to be checked. I'm virtually certain the timing is off. Read up on how to properly remove the crank pulley bolt, which can be a bear--I use a 41" breaker bar. Even beefy 625 lb.-ft. air impact wrenches don't phase them.

I was almost certain I had the marks in place. I actually marked it mysself before taking it off but some how it got messed with. Long story. I have looked on line for a diagram but was unable to locate one that sows it clearly, have you got one?