What's the p0320 code dodge ram 1500?

P0320 is a diagnostic trouble code for "Ignition/Distributor Engine Speed Input Circuit Malfunction". What this means is that the PCM is not able to tell the rotation speed of the crankshaft, which in turn means that the engine is not able to operate under the correct timing. If this is the case You will notice a lack of power when You are driving, and the car may stall. If this goes on for too long then You will run the risk of damaging the engine. Take the car into the shop and they can figure out where the actual issue is coming from, and then fix it. The price will be all over the place, depending on what the actual problem is.