99 Grand Caravan throwing a P1391?

if you,ll look at the wires going in to the distributor on that one you,ll see a bare spot right next to where the wires go in to the distributor on it, that is probably what is causing that to happen,the only way to correct the problem though is to replace the cam sensor,there's really no way to repair the wires on it,other than replacing the sensor,you need to also check the connections on the alternator that will cause a problem similar to the one your having,good luck.