TECHNICAL SERVICE BULLETIN: SERVICE ACTION: INVERTER COOLANT/DEBRIS FLUSHING/REPLACEMENT FOR CLUSTER MESSAGE "REFILL INVERTER COOLANT" (SA512) - This bulletin provides information to flush out the inverter low-conductivity coolant on certain 2019-2022MY
Niro EV (DE EV) vehicles produced from May 10, 2019 through October 4, 2021, which may exhibit a "Refill inverter coolant" message displayed on the instrument cluster due to poor flow of coolant/antifreeze inside the coolant pipes. In most cases, the inverter reservoir tank coolant may be filled to normal level and no DTC's are stored due to an increase operation of the electric water pump (EWP) that is 2,450 RPMs or more when checked.
