I've got a 2000 Ram 1500 4X4 plow truck (very rusty) that comes in about every 4 to 6 mos with a defective CKP (P0320)and a no-start. When it won't start, it shows no RPMs. The TPS & MAP output are OK so it's not a shorted sensor. We've never seen any signs of... Login to read more.