Re: Subaru Forester question about CEL and code 2040. The scanner code P0420 also said catalytic converter efficency, Bank 1 if that helps


Asked by Terlin77 Dec 29, 2012 at 10:31 AM about the 2006 Subaru Forester

Question type: Maintenance & Repair

1 Answer

Tom Demyan

Don't just replace the sensor it can be other issues causing the sensor to detect a problem. Check this link out for possible solutions.....

4 out of 4 people think this is helpful.

Your Answer

Add photo

Related Questions

  • Forester CEL blinking, low power, jumpy idle 11 answers

    My 2005 Subaru Forester just passed Rhode Island inspection last week. I didn't use for 6 days. Last night when we got home I moved the car and noticed a strong gas smell. This morning on I drove it c...

    Subaru Forester


    Maintenance & Repair

  • check engine light with flashing cruise control light 142 answers

    Checked codes at Auto Zone: catalyst efficiency low-bank 1 probably cause: CC failure possibly due to: (1) engine misfire or running condition (2) large vacuum leak (3) engine oil leakage into exhaus...

    2005 Subaru Forester XS


    Maintenance & Repair

  • Has anybody had problems with excessive oil consumption in the 2015 Subaru Forester? 321 answers

    I would like to buy a 2015 Subaru Forester in the next few months, but I'm concerned about the excessive oil consumption I keep reading about in older models and I know a class action lawsuit was file...

    2015 Subaru Forester 2.5i


    Maintenance & Repair

  • 1998 Subaru Forester with 270,000 miles on it. 19 answers

    I have a 1998 Subaru Forester with 270,000 miles on it. Seems to work fine, only one owner besides me, Only problem is the Engine Light is on. I've had it a month and have put 1,000 miles on it. Whe...

    1998 Subaru Forester Base


    Maintenance & Repair

  • Engine swap on a 1999 Forester 3 answers

    I have a 1999 Subaru Forester and the engine just burnt up on me. I have been looking at local Junk yards for a replacement; I have called two so far. They have both told me that the motor for a 99...

    1999 Subaru Forester S


    Maintenance & Repair

Search Subaru Forester Questions

Subaru Forester Experts

#1 Nick Eidemiller
Nick Eidemiller
Reputation 2,510
#2 lifeson34
Reputation 1,820
#3 walth
Reputation 1,700
View All

Related Models For Sale

Used Subaru Outback"
272 Great Deals out of 16,823 listings starting at $1,495
Used Honda CR-V"
713 Great Deals out of 54,147 listings starting at $1,495
Used Toyota RAV4"
731 Great Deals out of 43,402 listings starting at $1,990
Used Subaru Legacy"
155 Great Deals out of 10,598 listings starting at $688
Used Subaru Impreza"
133 Great Deals out of 9,921 listings starting at $1,950
Used Ford Escape"
1,252 Great Deals out of 88,470 listings starting at $750
Used Toyota Highlander"
483 Great Deals out of 19,227 listings starting at $3,900
Used Toyota Tacoma"
495 Great Deals out of 18,815 listings starting at $2,000
Used Subaru Impreza WRX"
7 Great Deals out of 413 listings starting at $6,599
Used Toyota 4Runner"
330 Great Deals out of 12,133 listings starting at $2,500
Used Subaru Impreza WRX STi"
23 Great Deals out of 621 listings starting at $12,999
Used Hyundai Santa Fe"
362 Great Deals out of 14,001 listings starting at $1,000

Used Cars For Sale

2016 Subaru Forester For Sale
3 Great Deals out of 16,084 listings starting at $24,845
2015 Subaru Forester For Sale
42 Great Deals out of 1,519 listings starting at $19,230
2014 Subaru Forester For Sale
32 Great Deals out of 927 listings starting at $14,950
2013 Subaru Forester For Sale
27 Great Deals out of 614 listings starting at $11,995
2012 Subaru Forester For Sale
30 Great Deals out of 749 listings starting at $10,500