The Check Engine Light may illuminate with a fault code P1121 stored. It is commonly caused by a failed three way coolant control valve. Valve replacement is recommended if this occurs.
Problems for specific Toyota Prius years:
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Most reported Toyota Prius problems
The center multi-function display may failure. This is commonly caused by poorly soldered internal connection. Our technicians tell us that these display panels can be successfully repaired or reconditioned by a shop specializing in such repairs.
The fuel gauge may read incorrectly. Our technicians tell us there is a recalibration procedure which should be performed to correct this issue.
The power inverter coolant pump may fail resulting in illumination of the Check Engine Light associated with fault code P0A93 stored. Our technicians tell us the power inverter coolant pump should be replaced if this occurs. A revised pump is available for 2004-2006 models, Toyota service bulletin #EG001-07.
The hybrid battery cooling fan may become restricted, resulting in illumination of the Check Engine Light and an associated fault code p0A82. Our technicians tell us that keeping the cooling fan clear of debris will help keep this fault code from setting and also may prolong the life of the hybrid battery.
Starting difficulties may develop, mostly noted if the car has been parked for several days. Toyota has changed the 12v battery size specification to help correct this concern. Our technicians tell us the battery tray will need to be replaced to accommodate the larger battery
The hybrid transmission may fail prematurely. Our technicians recommend changing the transmission fluid every 30K miles in order to help prolong transmission life. This service recommendation is over and above the Toyota recommendation to "check" the transmission fluid every 30k miles.
The fuel gauge may read incorrectly. A service bulletin has been released by Toyota regarding this concern. The fuel filler pipe or the instrument cluster may need to be replaced to correct this concern.
The high voltage hybrid battery may develop corrosion of the electrical harness resulting in premature failure. Our technicians tell us the hybrid battery must be replaced to correct this issue.
The hybrid transmission may fail prematurely. Our technicians recommend changing the transmission fluid every 30K miles in order to help prolong transmission life. There is a small square pan on the bottom of the transmission which should be removed to allow more fluid to drain. This service recommendation is over and above the Toyota recommendation to "check" the transmission fluid every 30k miles.
Premature tire wear is an concern due to the soft rubber compounds specified for original equipment tires. Our technicians tell us that most owners have changed to better wearing tires but fuel mileage has suffered as a result.
The fuel tank used a unique liner which has caused trouble in some vehicles. If problems occur with the fuel tank liner the fuel tank must be replaced.
I stopped in my driveway and shifted to reverse to park car but it barely moved and there was a loud grinding sound. Then the car would not move forward or in reverse. Small pieces of rusty steel were found in the path the left front wheel had followed and it was immobile. Dealer said no brake pad was present, after it was towed there, and also said that rotor would need to be replaced due to pitted surface. There were never any warning li...
critter got into the car possibly through the outside air intake and has died somewhere in the vehicle. Toyota took the interior apart looking for the dead critter with no luck. I need to have them take the dash apart and check where the air intake is.
Problem has not been fixed. Wrote to Toyota in CA and two dealers that have serviced the car. Only received an acknowledgement from Toyota in CA that they received my letter.