I changed my oil and the crankshaft sensor which was the last of the three Nissan sensors that needed to be replaced on my car. The car was running fine with both new camshaft sensors but now will not start since I changed out the crankshaft. I put the old crankshaft sensor back in but the car will only make a clicking noise. I just replaced the starter on this car less than three years ago and my battery was just replaced a few months ago. All lights, radio and everything works. I checked all fuses with a multimeter, and put in new ones just in case and I swapped the starter, ignition and ECM relays with the Headlamp high and low relays and all of those work just fine so I don't think the fuses or relays are bad. I cleaned the battery connection as well. What could've caused this? Would installing a new crankshaft causes the starter to die all of a sudden? When I replaced the camshaft sensor in bank 1 when getting the code P0345, the car would atleast crank and start. Now it doesn't do anything. I checked that the little pedal stop was still under the clutch as well.I have a new starter on the way but wanted to check if there was anything else that I could be missing. Such an odd issue. I'm not getting any error codes either... lol

 

Check and clean your ground connections.