We have a 1999 Dodge Ram 1500 automatic 360 V8. The scan tool gave my husband two codes. We would greatly appreciate any help deciphering them. First code is PO138 and says 02 Sensor circuit high voltage (Bank no. 1 sensor sensor no. 2) Second code is P1391 and says Intermittent loss of CMP or CKP signal. Thank you for your time.