Crank no start issue? The only error I get is P0335?

Basically, I have been trying to get this car started for a while. It cranks and feels like it wants to start. I look and check for spark and there is none. I've been trying to narrow down the issue. It seems like it's more electrical. I've done about 30 tests, and it seems that on my ignition coil signal wire I am only getting.5 volts on crank. I have 2.8 volts on my two crank shaft sensor wires (ECU end) I have not checked the power at crank on the crankshaft. The cams seem to have 5 volts steady on signal wire and constant wire. The only error I get is p0335 circuit malfunction other tests Leads me to think that I have a ground or circuit issue. I need to know what the voltage should read on these devices.