my nissan frontier truck just died like key turned off. 2 codes 1)P0420 and 2)P0340.

Question

turns over but will not start

Answer 1

if your battery is good, the P0340 is for the Camshaft Position Sensor which is built into the distributor which will have to be replaced also. you might also want to replace spark plugs and wires if you have not done so.