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My Prius Eco Mode Not Working after couple of thousand Kilometres

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Umair90, Jan 29, 2019.

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  1. Umair90

    Umair90 Junior Member

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    Hey guys. Hope you all doing good.
    I purchased a 2014 G Touring Edition. I simply love this car. At first it’s giving me 23Km/L but after 25,000km, now it’s giving me 18Km/L. Oil change on time.
    Actually i felt that my Car Eco Mode is not working properly. When i push pedal in Eco mode, it should be little hard. But No! It’s as smooth as riding a car in power mode. Im so tensed! No error codes, No warning signs, Nothing!
    Help require please.
     
    #1 Umair90, Jan 29, 2019
    Last edited: Jan 29, 2019
  2. bisco

    bisco cookie crumbler

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    welcome!
    eco mode doesn't really save more gas than careful driving. and hvac suppression can be duplicated with manual settings.
    so try that and see what mpg you get. if no improvement, look for other causes. dragging brake, tires pressure, clogged filters, gas reformulation and etc.

    btw, does the eco light come on?

    all the best!(y)
     
    #2 bisco, Jan 31, 2019
  3. Umair90

    Umair90 Junior Member

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    Thanks dear. I will check the dragging brake factor because at low speed i felt a weird sound from front. I mean something’s stucked, sound comes in and out. Will tell you the results afterwards. Thanks for the reply
    Cheers!
     
    #3 Umair90, Feb 1, 2019
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  4. Umair90

    Umair90 Junior Member

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    I checked my ride, and found a Brakepads draging sound with disc. The dealership said it’s normal but it’s not normal to me. May be the friction dtopping the milleage. Any thoughts?
     
    #4 Umair90, Feb 7, 2019
  5. ASRDogman

    ASRDogman Senior Member

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    Maybe a rock or something is caught in the caliper. Pads will rub on the rotor under normal driving.
    I guess rest is a better word? This is normal. Actually hearing them, is not.
    The caliper may be sticking. Have you cleaned the guide pins?
     
    #5 ASRDogman, Feb 7, 2019
  6. Umair90

    Umair90 Junior Member

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    Well to be honest, I didn’t serviced the brakepad yet. Brakes are working fine but I should go for service. Let’s see what happen next. Hope for the best!
     
    #6 Umair90, Feb 7, 2019
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  7. bisco

    bisco cookie crumbler

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    agreed, they may rub very lightly, not enough to hear, or wear anything.
     
    #7 bisco, Feb 9, 2019
  8. Umair90

    Umair90 Junior Member

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    I checked my car brakepads and they are perfectly fine. Sound disappeared. But the gas mileage still going down. Same issues
     
    #8 Umair90, Mar 10, 2019
  9. Umair90

    Umair90 Junior Member

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    NO ERROR, NOTHING!
    The Toyota dealership replied, sir your car have an issue regarding Eco Mode Pedal Remapping but we cannot figuare out the main issue. As There’s no error diagnosed.
     
    #9 Umair90, Mar 10, 2019
  10. bisco

    bisco cookie crumbler

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    Maybe the button is broken
     
    #10 bisco, Mar 10, 2019
  11. Umair90

    Umair90 Junior Member

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    On a dash, it’s showing Eco light but it’s not working that it should be. I’ve two prius at home. Mine got an issue but My brother’s works great.
     
    #11 Umair90, Mar 10, 2019
  12. Umair90

    Umair90 Junior Member

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    How to check either it’s button is broken or not?
     
    #12 Umair90, Mar 10, 2019
  13. Mendel Leisk

    Mendel Leisk Senior Member

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    Is this the front or rear brakes?

    if you have the rear wheels raised, parking brake released, and give the wheel a good push, it should free-spin one or two revolutions before stopping. There is "some" drag inherent, just the nature of disc brakes.

    Front brakes are really hard to check for drag, due to being connected to the driveshafts.

    I would suggest to feel all four wheels immediately after an extended drive, see if any feel particularly hot, which would be a sign of excessive drag. Slightly warm is not unusual, in particular if they all feel about the same.
     
    #13 Mendel Leisk, Mar 10, 2019
  14. Umair90

    Umair90 Junior Member

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    That grah sound is sorted. It’s coming from the tires or alloys but not from discs.
     
    #14 Umair90, Mar 10, 2019
  15. Umair90

    Umair90 Junior Member

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    I’ve been using Engine Oil 0-20W Total Quartz. Is there any possibility that oil decreases the mileage or eco mode is not working as it should be?
    Or Inverter Collent Level is a little above to Full?
     
    #15 Umair90, Mar 10, 2019
  16. Mendel Leisk

    Mendel Leisk Senior Member

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    Is it?

    How many miles btw?
     
    #16 Mendel Leisk, Mar 10, 2019
  17. Umair90

    Umair90 Junior Member

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    30,447 Miles
     
    #17 Umair90, Mar 10, 2019
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  18. Umair90

    Umair90 Junior Member

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    As it shows, collant level should be in between F and L.
    Dealership pour some extra and it’s not a little above F. Does that affect the issue?
     

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    #18 Umair90, Mar 10, 2019
  19. Umair90

    Umair90 Junior Member

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    One say, replace the main hybrid battery. I was like you kidding me. My car just done 30,447 miles.
     
    #19 Umair90, Mar 10, 2019
  20. bisco

    bisco cookie crumbler

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    if there were a battery issue, you would get the red triangle of death. how is the 12v health?

    i don't think fluid level matters, but syphon some out anyway.
    oil should be fine as long as it is not above full
     
    #20 bisco, Mar 10, 2019
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