One problem related to battery propulsion system has been reported for the 2009 Toyota Prius. The most recently reported issues are listed below.
2009 Toyota Prius. Consumer writes in regards to hybrid electric water pump recall notice. The consumer stated two weeks after the hybrid water pump was fixed, a red triangle lamp appeared on the dashboard and the vehicle began to overheat. The consumer went back to the dealer and was charged 4202/16 for the diagnosis and informed him the catalytic converter needed to be replaced. The consumer went to his personal mechanic, where the hybrid electric pump was replaced and the codes were cleared.