Recently I started to notice a small hesitation during accelration, epically when shifting from full elect to hybrid drive (engine + elect) or when going from the first half of the Eco bar to the second bar I tried to drive using normal and Eco mode same things happens, Checked my Car using OBD also there is no code Today the hesitation was noticeable like the car is losing power to move, it was during a traffic jam, and I was driving below the in the first half of the Eco bar, and after the battery left with 2 bar this happened when the car started the engine to charge the battery Car odo meter is 115k mile Changed the spark plug last year with oem ones Oil changed before 3 months
sounds like a fuel/air problem. i would check the battery health with dr. prius, then move on to the air filter, throttle body and etc.
Battery health is good, Air filter changed last year, how to check. The throttle body, By the way never did a fuel system cleaning before which includes the injectors, throttle body and etc
Battery cooling fan? Have you checked/cleaned it? You're certain the plugs weren't counterfeit? Fake ones usually work great, for a little while.
got them from the service center (official one for Toyota in country) battery cooling fan to be honest no i haven't checked, during this summer i have noticed that there's a hovering sound from the engine when i am climbing a long steep road, and when i remove my feet from the pedal the sound like the engine is calming down
The sound you describe is pretty normal behavior. The battery cooling fan is under the left rear seat. Look at the intake in the plastic panel down there. The panel comes out pretty easily, and you can clean the intake to the battery cooler fan right there. There are youtube videos that show how to do the whole thing very well with a vacuum cleaner.
