Gas mileage / knock sensor

Asked by Feb 25, 2017 at 07:49 AM about the 2000 Toyota Avalon XLS

Question type: Maintenance & Repair

Hi! So I just bought my 2000 Toyota Avalon
XLS and the check engine light came on.
They said it was the knock sensor but that it
could wait a little.  Then I started noticing
that my car would go from 1/2 tank up to
3/4 of a tank with out me putting gas on it.
Then I drove to another town on a highway
for about 3-4 hours . I started with a full tank
and the needle didn't drop as much as I
thought it would. It only went down to a little
lower than 3/4 of gas.
Is that normal for a floating fuel gauge
sensor?
If not, does that have to do with the knock
sensor?

4 Answers

299,945

The fuel gauge has nothing to do with the knock sensor. Most probably the fuel sending unit is faulty. That is in the fuel tank and part of the fuel pump assembly.

85,635

Nothing to do with the knock sensor. Best keep track of how much gas you put in, start checking the mileage. And no it is not normal for the gas gauge to go up unless someone is messing with you and is putting some more gas in the tank. When the gas gauge rose up to 3/4 did it stay there and drop when you used the car?

122,895

No, bad gas mileage is normally from a clogged catalytic converter and or a tuneup needed

If ur knock sensor is bad It will retared ur engine causing it to used a lot of fuel & lack of Power. fred If

Your Answer:

Avalon

Looking for a Used Avalon in your area?

CarGurus has 174 nationwide Avalon listings starting at $1,845.

Postal Code:

Toyota Avalon Experts

  • #1
    Tom Demyan
    Reputation
    2,140
  • #2
    lilfrosty357
    Reputation
    980
  • #3
    Farmboy93
    Reputation
    830
View All

Related Models For Sale

Used Toyota Camry
35 Great Deals out of 2,152 listings starting at $2,995
Used Honda Accord
30 Great Deals out of 1,640 listings starting at $2,671
Used Toyota Highlander
17 Great Deals out of 1,189 listings starting at $4,975
Used Toyota Corolla
113 Great Deals out of 4,257 listings starting at $1,995
Used Nissan Maxima
6 Great Deals out of 364 listings starting at $4,490
Used Toyota RAV4
80 Great Deals out of 3,950 listings starting at $838
Used Nissan Altima
47 Great Deals out of 1,232 listings starting at $2,800
Used Toyota 4Runner
15 Great Deals out of 506 listings starting at $4,500
Used Honda Civic
118 Great Deals out of 4,994 listings starting at $1,900
Used Chevrolet Impala
20 Great Deals out of 989 listings starting at $1,995
Used Hyundai Sonata
24 Great Deals out of 1,416 listings starting at $1,795

Used Cars For Sale

2019 Toyota Avalon For Sale
74 listings starting at $1,845
2018 Toyota Avalon For Sale
10 listings starting at $43,550
2017 Toyota Avalon For Sale
12 listings starting at $31,495
2016 Toyota Avalon For Sale
9 listings starting at $28,500
2015 Toyota Avalon For Sale
10 listings starting at $23,395

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.