CUSTOMER CONCERN Customer states the engine-temperature reading fluctuates while driving and DTC P0117 returns after coolant-temperature sensor replacement. CAUSE The 5-volt reference and warmed-up sensor signal tested correctly, confirming the radiator was not maintaining stable coolant temperature. CORRECTION Remove and replace radiator. Refill and bleed engine cooling system, clear DTC P0117 and verify stable coolant temperature.

CUSTOMER CONCERN Customer states the engine overheats and coolant leaks from the radiator area. CAUSE Inspection identified the larger radiator nearest the engine as the leaking engine-cooling radiator. CORRECTION Remove and replace engine radiator. Refill and bleed engine cooling system and verify no coolant leaks.