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Toyota Prius Hybrid System Questions



  • I have a 2002 prius and have 73500 miles without any big problems. Had regular maintenance, replaced tires twice and last year had fuel injection service. Have asked the dealer in 2010 & 2011 to check the battery (big) as the engine runs 5 to 6 minutes before stopping. They said the battery was fine but it still continues to run which it never did before. At the end of last year I was out of town for 6 weeks and as the car had only been driven once a week the small battery had to be replaced in January 2012. This mechanic also did the fuel injection service and told me again that the problem of the car running might be due to the big battery as it takes longer to charge as the battery runs down. If the battery has a 10 year warranty, it will run out in March. What can I do to insure that I don't have replace the battery soon after the warranty runs out? I love my car and as I don't drive many miles, I would love to keep it but I don't want to keep a 10 year old car if I have to spend 3K and worry about a lot of repairs.
  • No, it turns out it was the battery being defective. But now, if we forget and leave the dome light on in back by the morning the battery is flat. I mean, how many amps does a little light have anyway? This is silly. If I had a flashlight with a couple of D cells those dinky batteries wouldn't run down overnight unless it was a very bright beam. This whole thing with not being able to start this car has turned me very much negative about Prius. I also have a 2003 Tundra, and if I don't drive it for a week or so it will have a flat battery. Seems the computer in the engine is running and sucking juice out of the battery. Ridiculous, especially in the Prius where you have a godawful mess of batteries, and leaving a dome light on overnight kills the car??
  • tdactortdactor Posts: 2

    I am having the same problem now on my 2005 Prius with 110,000 miles, did you ever find out how to fix this problem with engine spinning and very little acceleration?

    @blburke said:
    My 2007 Prius has now done 30000 Km. Fuel consumption is poor at around 5.5 litres per 100 km. Sometimes when I accellerate the petrol engine simply spins (as if the clutch was slipping in a convention car) and there is no accelleration. The dealer says there is nothing wrong. Has anyone else experienced this?. Any ideas as to what the problem may be?

  • tdactortdactor Posts: 2

    I have a 2005 Prius with 110,000 mi. Sometimes when I accelerate the gas engine simply spins (as if the clutch was slipping in a convention car) and there is little acceleration and the gas engine doesn't shut off when coasting or braking as it always has in past. The battery screen shows it is not charging when this happens and is at 1 bar. then sometimes the hybrid battery guage will go from 1 bar to fully charged in under a minute or 2 and then show discharging just as fast which isn't possible. It goes away after a restart sometimes but then happpens again soon. Is it the TP sensor, Hybrid battery computer or ? I have gotten all kinds of codes including P0a93, P0a80, P1400, P040a. Does anyone know what is the problem and how to fix it?

  • PF_FlyerPF_Flyer Pennsylvania Furnace, PAPosts: 9,190

    Doing a quick search for those codes... P0a93 is for the inverter cooling system, P0a80 seems to be a code to replace hybrid battery pack, P1400 is about a voltage in the DPFE sensor (an emissions item, but still an electrical issue), and P040a is also an emission item. (EGR)

    Throw in your description of little acceleration and you might have something going on in the emissions system, but I'm no auto tech so definitely get another opinion. All the codes seem related to electrical issues as well, so it might even be one issue somewhere throwing a gremlin in the works. But I'd bet it's a bit more complicated than that.

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