CUSTOMER CONCERN DTC P2602 returns after the inverter coolant pump was replaced for a transmission oil-pump circuit fault. CAUSE Circuit checks and confirmed repair identified an internal failure of the electric transmission oil pump, not the inverter coolant pump. CORRECTION Remove and replace the failed transmission oil pump, clear DTC P2602, and verify transaxle-oil circulation and normal hybrid-system operation.

CUSTOMER CONCERN Check-engine warning is on with DTC P2602, and replacing the inverter water pump did not stop the code from returning. CAUSE P2602 applied to the transaxle oil-circulation pump rather than the inverter coolant pump. Power, ground and control-circuit testing identified the transmission oil-pump assembly as the failed component. CORRECTION Remove and replace the transmission oil-pump assembly, clear DTC P2602, and verify transaxle oil-pump operation.