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Prius Dashboard
Prius Dashboard  
I have a 10 year old Toyota Prius which has been a very reliable vehicle - until last week.
Last week I started getting a number of alarms up (see photo)
I drove the car to the local Toyota service centre and asked them to check it out.  They claimed that the problem was that the Hybrid Battery was failing but claimed that I could continue to drive the car just on the petrol engine until a new battery could be obtained (from Japan).
I managed to drive the car home (about 12 km) but it was very sluggish and the petrol engine, though running quite fast was not transferring much torque to the wheels.  I only just managed to get it home at about 5 km/h.  I have since been back again to the service center but they were unhelpful.
In driving the car it felt as though the transmission(CVT) appeared to be slipping.
Can you advise whether it is possible to drive a Prius on the petrol motor alone if the battery is failing.


What they told you was wrong, you can not drive on the petrol engine for an extended time, the system needs the input from the generators to let the transmission work correctly. the electric motor generators drive the wheels more than the engine, most of the power from the engine is used to power the generators.

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Ted Ritter


I have more than 28 years experience as toyota technician, I will be able to answer most questions related to the Toyota product line up to the present year models,I am located in the US but welcome questions from other regions of the world. When asking a question please provide specific information: year,model, engine,transmission information. Provide as much information as possible including a brief repair history if possible. I have been a volunteer here for more ten years an have answered over 16,000 questions helping Toyota owners with their problems and save thousands of dollars without any compensation, some of my answers are published on many other websites including google and various automotive forums. DONATIONS ARE VERY MUCH APPRECIATED, IF YOU HAVE RECIEVED HELPFUL INFORMATION PLEASE MAKE A DONATION. AS OF TODAY (JULY 22, 2014) ALL REQUESTED GRAPHICS, ILLUSTRATIONS, DIAGRAMS, PHOTOS, WILL REQUIRE THE MINUMUM DONATION UP FRONT.


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