Keywords: I have a 2001 Toyota Highlander and about a year ago the check engine light came on, we did not remember the code # the first time it was checked and the second time it read P1120 so our mechanic said we needed to wait for the check engine light to come back on. It has not come back on and the only problem we have been having is that we fill up the gas tank more frequently now and do not get good millage. The car runs perfectly other then not good gas millage. Poor gas milage, what can be the cause? Any answers?

20

Asked by Apr 28, 2013 at 01:28 PM about the 2001 Toyota Highlander Limited V6

Question type: Maintenance & Repair

2 Answers

107,625

You could get the codes read again to see if something has come up. Air up the tires is a big step towards good gas mileage. Take it 10% over the recommended PSI for another 5% MPG. If the engine has close to 100,000 miles, it could use a set of plugs and a new O2 sensor.

1 people found this helpful.

It should be able to be read w/o the engine lite on.Try taking it to an autozone and they will read it for free.Have you tried putting in a couple of cans of WHOLE engine cleaner?If an injector is dirty it should clean it.Hope this helps.

Your Answer:

Toyota Highlander Experts

  • #1
    Wendy Tucker
    Reputation
    4,840
  • #2
    Tom Demyan
    Reputation
    4,250
  • #3
    Shawntele Lewis
    Reputation
    2,500
View All

Related Models For Sale

Used Toyota 4Runner
256 Great Deals out of 34,749 listings starting at $1,995
Used Toyota RAV4
479 Great Deals out of 79,637 listings starting at $1,995
Used Acura MDX
284 Great Deals out of 16,121 listings starting at $1,990
Used Toyota Camry
743 Great Deals out of 73,783 listings starting at $1,195
Used Honda CR-V
590 Great Deals out of 78,097 listings starting at $1,492
Used Toyota Sienna
232 Great Deals out of 22,782 listings starting at $2,000
Used Ford Explorer
880 Great Deals out of 68,057 listings starting at $950
Used Nissan Pathfinder
311 Great Deals out of 24,388 listings starting at $2,495
Used Toyota Tacoma
421 Great Deals out of 48,132 listings starting at $2,994
Used Jeep Grand Cherokee
840 Great Deals out of 76,541 listings starting at $900

Used Cars For Sale

2018 Toyota Highlander For Sale
3 Great Deals out of 39,064 listings starting at $27,999
2017 Toyota Highlander For Sale
26 Great Deals out of 1,295 listings starting at $25,498
2016 Toyota Highlander For Sale
79 Great Deals out of 2,303 listings starting at $18,985
2015 Toyota Highlander For Sale
89 Great Deals out of 3,261 listings starting at $15,600
2014 Toyota Highlander For Sale
25 Great Deals out of 727 listings starting at $16,304

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.