A faulty crankshaft position sensor (CKP) or camshaft position sensor (CMP) can absolutely prevent a 2002 Dodge Grand Caravan from starting. These sensors are crucial for the engine's computer (PCM) to know the position of the crankshaft and camshaft, which is essential for precisely timing fuel injection and ignition. Without accurate information from these sensors, the PCM won't allow the engine to start. The engine might crank (turn over), but it won't fire. In some cases, it might not even crank if the PCM is completely confused.
Therefore, yes, a bad crankshaft or camshaft position sensor is a highly probable cause for your Grand Caravan's no-start condition.
