2005 Outback Check Engine Light on after running out of gas

Asked by Jun 27, 2017 at 07:42 PM about the 2005 Subaru Outback 3.0R L.L. Bean Edition Wagon

Question type: Maintenance & Repair

Ran out of gas several months ago which immediately triggered the CEL (code
PO 420). Have reset it several times but the light keeps coming back on. Car
has 208,000 miles on it. Have always used premium fuel as recommended by
the manual. I am wondering if the sediment at the bottom of the gas tank got
sucked into the system when I ran out of gas and is clogging the fuel injectors.
One Autozone employee suggested using Lucas fuel treatment with every tank
of gas, while another said to only put fuel treatment in every 3,000 miles or so.
Any ideas as to what my problem could be and how I could fix it?

6 Answers

103,515

If it was caused by the gas, fill it up at another station, clear the code and see what happens. Fuel system cleaner can't hurt. Changing the fuel filter might also be a good idea.

103,515

This is probably a coincidence. PO420 is a catalytic converter problem. https://www.discountconverter.com/catalytic_converters_news/new s_page.cfm?Key=catalytic_converter-&News=120

1 people found this helpful.
64,145

So you are thinking about taking advice from an $8.00 per hour Autozone employee? Running out of gas likely caused the issue.

1 people found this helpful.
103,515

I got a raise Bob. Now I make $8.50 selling fuel system cleaner ;)

1 people found this helpful.
965

Sounds like the cat is no longer within the efficiency limits. Running out of gas won't cause that, it probably jus happened at the same time by accident. Also if you have any other issues like misfires or car running rich. Fix them first

1 people found this helpful.
77,935

Clear the computer and see if the code comes back. My S-10 Pick Up did that a few years ago. The code never came back. I agree that running out of gas has nothing to do with the trouble code appearing. If the code does come back you'll need a catalytic converter. HTH. -Jim

Your Answer

Outback

Looking for a Used Outback in your area?

CarGurus has 39,328 nationwide Outback listings starting at $1,500.

ZIP:

Subaru Outback Experts

  • #1
    Markw1952
    Reputation
    10,400
  • #2
    TheSubaruGuruBoston
    Reputation
    3,650
  • #3
    F_O_R
    Reputation
    3,530
View All

Related Models For Sale

Used Subaru Forester
252 Great Deals out of 34,359 listings starting at $1,495
Used Honda CR-V
479 Great Deals out of 72,005 listings starting at $1,300
Used Subaru Impreza
176 Great Deals out of 21,588 listings starting at $1,919
Used Subaru Legacy
150 Great Deals out of 12,875 listings starting at $1,240
Used Toyota RAV4
425 Great Deals out of 74,147 listings starting at $1,995
Used Toyota 4Runner
281 Great Deals out of 32,848 listings starting at $950
Used Toyota Highlander
380 Great Deals out of 48,090 listings starting at $1,500
Used Toyota Tacoma
439 Great Deals out of 44,078 listings starting at $1,995
Used Honda Accord
424 Great Deals out of 101,059 listings starting at $1,200
Used Toyota Camry
761 Great Deals out of 70,900 listings starting at $1,200
Used Jeep Grand Cherokee
831 Great Deals out of 75,648 listings starting at $899
Used Ford Escape
975 Great Deals out of 108,545 listings starting at $850
Used Honda Pilot
387 Great Deals out of 40,783 listings starting at $1,995

Used Cars For Sale

2018 Subaru Outback For Sale
16 Great Deals out of 28,442 listings starting at $22,094
2017 Subaru Outback For Sale
72 Great Deals out of 2,535 listings starting at $20,465
2016 Subaru Outback For Sale
39 Great Deals out of 1,325 listings starting at $11,995
2015 Subaru Outback For Sale
46 Great Deals out of 1,732 listings starting at $10,888
2014 Subaru Outback For Sale
22 Great Deals out of 940 listings starting at $7,451

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.