CUSTOMER CONCERN The vehicle will not start after engine replacement, the ECM and TCM do not communicate, F-CAN voltage exceeds 8 volts, and VSA DTCs 86-12, 86-13, 86-14, and 86-24 are stored. CAUSE The four-wire A/C compressor connector and rear oxygen-sensor connector were interchanged during engine installation, corrupting the high-speed F-CAN circuit. CORRECTION Reconnect the A/C compressor and rear oxygen-sensor harness connectors to their correct components, clear DTCs