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.