I have a 2011 Prius C. I've gone from an average of about 48 mpg down to a current 36 mpg in a matter of a month. WHAT could be causing this? This car gets the best care, always on schedule, at the

Asked by Aug 22, 2016 at 08:16 PM about the 2011 Toyota Prius

Question type: Maintenance & Repair

Mileage started dropping about 6 weeks ago, from 48 to 44, then to 42, now at 36 mpg.  Dealer doesn't want to hear it.  I think it might be the big battery, and they don't want to replace it.  Not sure, of course.  Cannot find the Trim on any of my paperwork.  Don't know which it is.  It's a 5 door hatchback.  

10 Answers

18,855

Did you recently replace the tires??

No new tires. Tires are in good shape. I guess I should have mentioned that I have about 77,000 miles on it now.

18,855

Of course, how you drive makes a really big difference.... How many miles are on your car? I cannot imagine that your battery is bad considering you have a 2011.. we have a 2009 PRIUS. We just replaced the tires with Continental energy saver tires...it handles better, but lost about 1 or 2 MPG.

I drive the same way I've driven since I was 16. Not any different from the time I purchased this car to now.

18,855

We have 68000 miles on our 2009, but, I've heard people who have 125,000 miles or more and no large battery issues.. By the way, Toyota warranties the hybrid battery for a long time, check the website....In California, our hybrid battery is under warranty for 10 years or 150,000 miles... It does vary in other states... I would think you're covered.... I'm sure that you can get the hybrid battery tested?

18,855

So, you purchased your car brand new?

18,855

Take a look at your owners manual.... If you can't get anywhere with your local dealership, call the corporate office.... The last thing Toyota wants is disgruntled clients, especially with the Prius... One thing we have had trouble with is the struts....had to recently replace them, NOT a very strong part of the car. After we did this, we noticed an increase in MPG.

18,855

Found this for you on the Internet------ "The battery pack in any hybrid Toyota is warranted either for 10 years or 150,000 miles (in states with California emissions laws) or 8 years or 100,000 miles in all other states." And, he adds, "There's no pro-rating at all. The battery will be replaced at no cost if necessary during the warranty period."May 13, 2011

18,855

If an independent mechanic confirms that your hybrid battery is failing, take this report directly to your dealership......if they still won't help you, pitch a bitch to Toyota corporate.....

18,855

If your hybrid battery is truly failing, YES, that would really hurt your mileage.....

Your Answer

Add photo

Related Questions

Prius

Looking for a Used Prius in your area?

CarGurus has 155 nationwide Prius listings starting at $3,490.

Postal Code:

Search Toyota Prius Questions

Toyota Prius Experts

#1 raae
raae
Reputation 610
#2 TupeloMS
TupeloMS
Reputation 570
#3 jrdregs
jrdregs
Reputation 400
View All

Related Models For Sale

Used Toyota Camry
53 Great Deals out of 1,642 listings starting at $800
Used Toyota Prius v
6 Great Deals out of 114 listings starting at $14,888
Used Toyota Corolla
175 Great Deals out of 3,889 listings starting at $1,995
Used Honda Civic
345 Great Deals out of 4,847 listings starting at $1,750
Used Toyota Prius c
3 Great Deals out of 135 listings starting at $8,900
Used Honda Accord
96 Great Deals out of 1,243 listings starting at $1,495
Used Toyota RAV4
100 Great Deals out of 3,258 listings starting at $3,000
Used Toyota Prius Plug-in
2 listings starting at $22,900
Used Honda Fit
9 Great Deals out of 740 listings starting at $2,688
Used Toyota Yaris
42 Great Deals out of 723 listings starting at $1,488
Used Honda CR-V
46 Great Deals out of 2,436 listings starting at $1,595
Used Chevrolet Volt
154 listings starting at $13,995
Used Ford Fusion
194 Great Deals out of 1,844 listings starting at $1,976

Used Cars For Sale

2017 Toyota Prius For Sale
71 listings starting at $27,310
2016 Toyota Prius For Sale
8 listings starting at $24,900
2015 Toyota Prius For Sale
5 listings starting at $19,877
2014 Toyota Prius For Sale
11 listings starting at $16,900
2013 Toyota Prius For Sale
12 listings starting at $13,888

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.