our 300c has come up with some error codes that neither us nor the mechanic can fix they are PO657 Solenoid supply voltage circuit - how do you fix this PO710 Tranmission temperature sensor circuit - how do you fix this PO717 Input speed sensor 1 circuit no signal - again hot to fix it. have only had the car 3 months, but 6 days out of warranty when this happened and Chrysler dealer didn't want to know Thanks