CUSTOMER CONCERN READY mode intermittently fails, the navigation display flickers, and DTCs P3000, C1545, B1585, B1551, and B15F9 are stored. CAUSE The key-fob battery was too weak for reliable smart-key recognition, producing intermittent startup and electrical symptoms. CORRECTION Remove and replace the key-fob battery, clear the stored DTCs, and verify consistent smart-key recognition, READY mode, and navigation-display operation.

CUSTOMER CONCERN The vehicle ran out of fuel and would not enter READY mode after refueling; the BCM, PCM, and hybrid ECU stored B1206, B2321, B2324, P2311, and P3000. CAUSE Fuel depletion left hybrid-system shutdown DTCs latched across multiple control modules, preventing READY mode even after fuel was added. CORRECTION Clear the DTCs from every affected control module, confirm READY mode and engine startup, and verify no codes reset during the road test.

CUSTOMER CONCERN Check Hybrid System warning is on with P0A80, P3000, C1259, and C1310. CAUSE Confirmed failed high-voltage hybrid battery pack. CORRECTION Remove and replace the high-voltage hybrid battery pack, clear DTCs, and verify battery block voltages and hybrid-system operation.

CUSTOMER CONCERN Customer states the master warning and check-engine lights return after approximately 10 miles, with P0A80 and P3000 information code 123. CAUSE Road-test scan data showed excessive variation between high-voltage battery blocks; a block differed by more than 0.5 volt under load, confirming battery-pack deterioration. CORRECTION Remove and replace high-voltage battery pack. Clear hybrid-system DTCs.