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2007 Prius new owner

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by fand, May 4, 2012.

  1. fand

    fand Junior Member

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    2007 Prius
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    Three weeks ago, I bought a used 2007 Prius, pretty basic model, with 50 000 miles. I have driven it only a few hundred miles (I am retired). Fuel refill & display agree that I am getting ~ 35 mpg. I must say I am disappointed. The driving has been brief freeway stretches & many stops for errands, the total trip time usually 2-4 hours. I thought that this was what the Prius excelled at. I was expecting much better mileage for this type of driving. Because I am retired, I have no set daily run. I hope to try some longer trips very soon.

    Outside air temps at his time of year in coastal Central CA ~45° nights & 66° days. It's about to get warmer.

    So far just level ground & gentle hills.

    The day after I bought the car I discovered that the engine oil was significantly overfilled. This is crime of incompetence--not good for the engine. I hope to get this fixed tomorrow.

    I do not know the age of the 12 v battery. How would I determine it? CARFAX does not mention a battery replacement. After ~18 hr rest, voltage = 12.33 v.

    Tires & alignment seem to be fine.

    My old car is a 1989 Nissan Sentra. It got 34 mpg generally, & 38 mpg on freeway trips, for many years after I bought it.

    I drive very conservatively, going very easy on brakes & acceleration. I never warm the car up by idling. I always drive in D mode. I never use AC (where I live, the heater is often more appropriate in the summer!)

    I have never used a forum like this before, & I am by no means sure of what I am doing. I hope my message gets there. The procedures aren't very clear. I tried to send this message an hour ago, only to find that I had been logged out with no notification.

    Three weeks ago, I bought a used 2007 Prius, pretty basic model, with 50 000 miles. I have driven it only a few hundred miles (I am retired). Fuel refill & display agree that I am getting ~ 35 mpg. I must say I am disappointed. The driving has been brief freeway stretches & many stops for errands, the total trip time usually 2-4 hours. I thought that this was what the Prius excelled at. I was expecting much better mileage for this type of driving. Because I am retired, I have no set daily run. I hope to try some longer trips very soon.

    Outside air temps at his time of year in coastal Central CA ~45° nights & 66° days. It's about to get warmer.

    So far just level ground & gentle hills.

    The day after I bought the car I discovered that the engine oil was significantly overfilled. This is crime of incompetence--not good for the engine. I hope to get this fixed tomorrow.

    I do not know the age of the 12 v battery. How would I determine it? CARFAX does not mention a battery replacement. After ~18 hr rest, voltage = 12.33 v.

    Tires & alignment seem to be fine.

    My old car is a 1989 Nissan Sentra. It got 34 mpg generally, & 38 mpg on freeway trips, for many years after I bought it.

    I drive very conservatively, going very easy on brakes & acceleration. I never warm the car up by idling. I always drive in D mode. I never use AC (where I live, the heater is often more appropriate in the summer!)

    I have never used a forum like this before, & I am by no means sure of what I am doing. I hope my message gets there. The procedures aren't very clear. I tried to send this message an hour ago, only to find that I had been logged out with no notification, so I had to rewrite it.
     
  2. catgic

    catgic Mastr & Commandr Hybrid Guru

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    FAND – You posted in the Prius v Fuel Economy sub-forum of the Prius v Forum (i.e. 2012 Prius v Station Wagon), which is not the Prius “versus†Fuel Economy Forum, as you may have thought. You should have posted this question in the Gen II Prius Fuel Economy sub-forum of the Gen II (2004-2009) Toyota Prius Forums. Maybe a moderator will eventually move it over to there. Anywho, Welcome To The Fight Against Petrol Terrori$ism…One Gallon Not Consumed At A Time. Let me respond to your MPG concerns.

    First, press the RESET button on the CONSUMPTION SCREEN to reset the running MPG calculation. Then let me invite you to do some light reading. Click on the link in my signature to my Ten Tips Guide To Maximizing MPG In A Prius. There are nuggets of info there about Pre-Operative Set Up and Driving Technique that can help you improve your overall fuel economy. Additionally, you might want to read this: “"Why don't I get the EPA Mileage?" @ http://priuschat.com/forums/knowledge-base-articles-discussion/37214-why-don-t-i-get-epa-mileage.html

    The next thing I would do is to check your 12V Accessory Battery using this built-in self test procedure for the 2004-2009 12V Accessory Battery:

    • Drive-run the Prius for around 30-minutes to assure the 12V Battery is fully charged. Turn off the radio and any accessories.
    • Without pressing the BRAKE PEDAL, depress the POWER BUTTON once and release to enter ACC MODE.
    • Press and hold the MFD INFO Button, then turn the headlights on and off three times to enter MAINTENANCE MODE; release MFD INFO Button.
    • Press “Menu†(on screen).
    • Press “Display Check.â€
    • Press “Vehicle Signal Check†- the voltage level of the 2V Accessory Battery is shown and displayed on the MFD. It should be about 12.4 to 12.8 Volts (normal for an unloaded battery, no lights or accessories on).
    • Again without pressing the brake pedal, press (and release) the POWER BUTTON “ON†to put an electrical current load on the battery - the voltage should stay above 12.0V (if it is reading less than 12.0 Volts, the 12V Battery likely is not well, or there is a fault or unusual load somewhere)
    • Press the BRAKE PEDAL and press POWER BUTTON once to enter "READY" MODE - the battery is now charging at about 14V (if less than 13.6V or more than 14.4V is indicated there may be a problem with the charging circuit)
    • Turn POWER Button “OFF†to leave MAINTENANCE MODE.
    If the 12V Battery checks O.K., then the problem likely is that you are down on the Max-MPG Learning Curve and still learning how to drive “Hybrid $mart.†Read, heed, and put to practice my Ten Tips Guide To Maximizing MPG In A Prius.

    Start from a clean MPG slate. Top-off your gas tank to full, press RESET on the CONSUMPTION Screen, and then drive your new fuel-sipper for a tank-full’s worth to see if your new pre-operative set-ups and new hybrid driving techniques are bearing any MPG Fruit. (i.e. Take Two Aspirins & See Me Again After You Drive Through A Full Tank-Full Worth Of Gasoline) Have Fun…
    :plane:
     
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  3. seilerts

    seilerts Battery Curmudgeon

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    The oil could be the wrong grade as well. Drain it and refill with 5W30.

    Your 12V is okay, if you measured 12.33V with a voltmeter after 18 hours of sitting.

    Next would be tires. Please report back with size, brand/type, and pressure.
     
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  4. edthefox5

    edthefox5 Senior Member

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    Model:
    Two
    Actually don't drive around first before you do the MFD battery check. That will put a good surface charge on the battery and not tell you the whole story under load.
    Check it first thing in the morning before you start the car as there will be no surface charge and please tell us what the 2nd button push voltage is. Thats the true under load voltage.

    Checking it with a volt meter with the car not under load looks normal at 12.3 but the real story is under load first thing in the morning.
    I'm betting 11.9

    I highly recommend changing the Inverter Coolant asap. Thats coolant is the heart of keeping the Inverter and transmission happy and is easily contaminated. You will see a good bump in mileage in changing it to. Its very very easy to change.
     
  5. fand

    fand Junior Member

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    Again, I don't know if I am doing the right thing by replying to the Thread, but I'll take a chance.

    I thank all of you who replied to my questions..

    I ran the 12 v battery self test. The car had been resting for several hours.
    Vehicle Signal check value: 12.1 v. (Compare my 12.33 v value from a voltmeter measurement after resting overnight.)
    Value with current load: 11.8 v.
    Charging in "Ready Mode": 14.2 v.

    The tires seem to be identical, brand new Hercules Tour 4.0 185/65R15 88H M+S. The pressures, after 4 hours in shade & evening cool, are ~35 psi, as recommended by Toyota.

    I serviced my Sentra myself for 180 000 mi, & I would at least like to be able to change fluids &c. on this one. However, I am still an amateur, & I do everything by the book. Unfortunately, I don't have the book, & it looks like one could spend $500 on manuals. Are there any alternatives?
     
  6. fand

    fand Junior Member

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    5/5 1000, car in sun, not yet driven today.
    Repeat of 12 v battery self test.

    Vehicle Signal Check: 11.9 v.
    With load: 11.6 v.
    Charging: 14.3 v.

    I have to sign off for today!
     
  7. catgic

    catgic Mastr & Commandr Hybrid Guru

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    Fand - Run, do not walk to purchase a new 12V Accessory Battery to replace the marginal 12V Battery that is in there now. :plane:[/QUOTE]
     
  8. edthefox5

    edthefox5 Senior Member

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    Yep that little 12 volt battery is toast. Which makes sense given that the car is not driven alot.

    By the way please post anything anytime. We enjoy helping Prius owners. And welcome to our little club!:welcome:

    Also not sure if the tires you listed are Low Rolling Resistance (LRL tires) tires but please up your inflation to at least 40 psi front & rear. The car will ride a little rougher but return much better mileage. See if you can stand how rough the car rides. if not back off to 39 or 38 because 35 psi will not yield very good mileage. It makes a big difference.

    And the Chiltons/Haines service manual avail at autoparts stores for a Prius for $16.95 is not bad for a shade tree mechanic. Some of the stuff is mixed up a little for different generation years but for the most part it will help.
     
  9. seilerts

    seilerts Battery Curmudgeon

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    Get the Bentley manual from Amazon, and a new 12V battery.
     
  10. fand

    fand Junior Member

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    The whole format of this thread has suddenly changed today, so, again, I don't know what is going on with this forum. Why is the latest message copied into this message box?

    Any how, just this:

    I already increased the tire pressure to 40 psi . These are not LRL tires; in fact, the Prius manual doesn't even mention them. The problem I am going to have with getting a new battery is that I bought this car from a dealer only 25 days ago. I don't think I should have to pay for a battery. They obviously didn't check it out properly. I think I am in for a fight.
     
  11. fand

    fand Junior Member

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    Elsewhere on this Forum, I have read that the British Priuses are somewhat different. Does that manual have everything needed for an American versions?
    The reviews in Amazon are quite variable, ranging from ecstatic endorsement to grouchy disapproval about every little detail. Thanks for the suggestion, though. I'll try to find out more.