2000 outback losing power going uphill also gets louder , starts fine runs and revs smooth in park. Check engine light is on code 420 (cat) last time uphill check engine light was flashing

Asked by TIMOTHYJMC Mar 12, 2019 at 09:29 PM about the 2000 Subaru Outback

Question type: Maintenance & Repair

7 Answers
2,570

Sirkut_Interrupted answered 5 years ago

Anytime u have a lack of power uphill and a flashing check engine light its fuel related.. 99% of the time its lack of fuel(failing pump)

Mark helpful

F_O_R answered 5 years ago

Lack of power up a hill could be an ignition miss or a plugged up catalytic converter.

Mark helpful
2,570

Sirkut_Interrupted answered 5 years ago

Clogged converters, dirty mass airflow sensor, and severe ignition coil problems are causes but its more likely to be fuel pressure problems when dealing with uphill problems

Mark helpful
2,570

Sirkut_Interrupted answered 5 years ago

P0420 Cat inefficiency.. computer doesnt like the oxygen storage of the cat... has nothing to do with it being blocked

Mark helpful
2,570

Sirkut_Interrupted answered 5 years ago

Get a chrap scantool that has live data graphing and look at the oxygen sensor voltage, go for a test drive. During a heavy acceleration or uphill drive monitor the voltage and see what it is.. if it drops lean near 0 volts its a fuel issue

Mark helpful

Your Answer:

Related Questions

Outback

Looking for a Used Outback in your area?

CarGurus has 38,894 nationwide Outback listings starting at $1,300.

ZIP:

Own this car?

Share your experience with others.

2000 Subaru Outback

Write a car review

Review another car

Shortcuts

Search Subaru Outback Questions

CarGurus Experts

  • #1
    Mark Weiner
    Reputation
    33,230
  • #2
    TheSubaruGuruBoston
    Reputation
    28,320
  • #3
    Keith Cahalan
    Reputation
    3,310
View All

Know more, shop wisely

Search

Related Models For Sale

Used Subaru Forester
1,047 Great Deals out of 27,219 listings starting at $1,995
Used Toyota RAV4
1,857 Great Deals out of 28,806 listings starting at $1,350
Used Honda CR-V
2,055 Great Deals out of 41,712 listings starting at $1,100
Used Subaru Legacy
324 Great Deals out of 7,042 listings starting at $499
Used Toyota 4Runner
1,185 Great Deals out of 18,672 listings starting at $1,800
Used Toyota Tacoma
1,926 Great Deals out of 31,767 listings starting at $3,500
Used Subaru Impreza
365 Great Deals out of 7,651 listings starting at $875
Used Toyota Camry
2,022 Great Deals out of 35,997 listings starting at $375
Used Toyota Highlander
1,256 Great Deals out of 18,048 listings starting at $675
Used Honda Accord
1,536 Great Deals out of 29,370 listings starting at $500
Used Jeep Wrangler
3,250 Great Deals out of 58,533 listings starting at $3,000

Used Cars for Sale

2024 Subaru Outback For Sale
151 Great Deals out of 25,203 listings starting at $25,994
2023 Subaru Outback For Sale
112 Great Deals out of 1,428 listings starting at $24,417
2022 Subaru Outback For Sale
96 Great Deals out of 1,794 listings starting at $18,986
2021 Subaru Outback For Sale
150 Great Deals out of 2,190 listings starting at $15,999
2020 Subaru Outback For Sale
129 Great Deals out of 1,413 listings starting at $15,988

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. Content will be removed if CarGurus becomes aware that it violates our policies.