Ford P1065 OBD-II Trouble Code Definition: P1065 ECM Power Supply Circuit P1065 Ford OBD-II Trouble CodeDescription: Causes – ECM Harness power supply circuit is open or shorted– ECM Harness ground supply circuit is open or shorted– ECM may be faulty When is the obd code mean? ECM back-up RAM system does not function properly. Symptoms Engine […]