CUSTOMER CONCERN Service High Voltage Charging System message is displayed with DTC P1FFF. CAUSE Confirmed failed hybrid battery coolant level sensor. CORRECTION Remove and replace the hybrid battery coolant level sensor, clear DTC P1FFF, and verify the high-voltage charging system operates normally.

CUSTOMER CONCERN The Service High Voltage Charging System message is displayed with DTCs P1FFD and P1FFF. CAUSE Graphing the battery coolant-level-sensor circuit showed intermittent voltage spikes to 5 volts instead of the normal 3.5 volts, confirming a sensor-harness fault. CORRECTION Remove and replace the drive-motor battery coolant-level sensor harness, program the HPCM2 and BECM updates supported by the repair, clear P1FFD and P1FFF, and verify charging-system operation.