"Not Ready " response from emissions readiness monitor for the catalyst converter?

Asked by Aug 15, 2015 at 04:21 PM about the 2007 Subaru Forester

Question type: Maintenance & Repair

I took my 2007 Subaru Forester for an
emissions test a week ago. The test
showed an overall "fail" because of two
codes that popped up for the O2 sensor, as
well as the OBD system/readiness monitor
showing "not ready" for the O2 sensor and
the catalyst converter. The check engine
light was on as well. I got the O2 sensor
replaced the day after, and the check engine
light has not been on since. However, when
I returned to get the emissions retest, they
told me that the readiness monitor was still
showing as "not ready" for the catalyst
converter. There was no guidance on fixing
the problem, just that it needed to be fixed. I
then visited 3 auto parts stores for opinions,
and got the following recommendations: 1)
the sensor may be showing 'not ready' after
the O2 sensor was replaced, as the
computer may have been reset (the battery
was unhooked) and I may need to drive the
car an additional 60 mikes to get the
computer to register correctly; 2) I may
need to replace the converter, however
there's no way to confirm. The stores did
the computer and verified that absolutely no
codes are generating. Has anyone
experienced this issue before who could
offer some insight on the best course of
action from  this point?

1 Answer

60,745

What the parts stores are telling you is partly true. Once the O2 sensor was repaired the computer was cleared by the repair shop. This is the correct procedure. Since your Subaru is a 2007 model you will pass, under Federal Law, with 1, but only 1, readiness monitor not set. You need to keep your gas tank between 1/4 and 3/4. No more and no less. Then just drive normally for 1 week. If you do need a catalytic converter the check engine light will come back on and you'll get a trouble code for it. Usually code P0420 is for a bad converter. After the week is up visit the auto parts store again just to confirm that the readiness monitors are set. Remember that if all but 1 is set, doesn't matter which one, you'll still pass inspection. As far as the driving goes, mix it up between around town and the expressway. Just as you normally would. HTH. -Jim

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • Why does Subaru have a reputation for building reliable cars? 204 answers

    I recently became aware that my 2001 Forester has a leaking head gasket and a bad wheel bearing. Although the vehicle is 12 years old, it has only 95,000 miles and has been meticulously cared for (I ...

    2001 Subaru Forester S

    -

    Maintenance & Repair

  • check engine light with flashing cruise control light 195 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? 368 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

  • 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

  • PO420 Catalyst Below Threshold 3 answers

    PO420 Catalyst Below Threshold Code only This code appeared and I did a few things like cleaning the manifold and engine, then shut off the code to see how long til it re appears(did this a few tim...

    2007 Subaru Impreza

    -

    Maintenance & Repair

Search Subaru Forester Questions

Subaru Forester Experts

#1 Nick Eidemiller
Nick Eidemiller
Reputation 3,510
#2 walth
walth
Reputation 2,800
#3 lifeson34
lifeson34
Reputation 2,460
View All

Related Models For Sale

Used Subaru Outback
316 Great Deals out of 30,086 listings starting at $1,750
Used Honda CR-V
901 Great Deals out of 61,520 listings starting at $1,200
Used Toyota RAV4
680 Great Deals out of 62,275 listings starting at $1,500
Used Subaru Impreza
205 Great Deals out of 13,441 listings starting at $1,995
Used Subaru Legacy
216 Great Deals out of 16,074 listings starting at $1,300
Used Subaru Impreza WRX
53 Great Deals out of 1,142 listings starting at $1,500
Used Toyota 4Runner
329 Great Deals out of 20,882 listings starting at $1,990
Used Toyota Highlander
521 Great Deals out of 25,542 listings starting at $2,100
Used Ford Escape
1,206 Great Deals out of 90,427 listings starting at $1,295
Used Toyota Tacoma
627 Great Deals out of 35,082 listings starting at $2,155
Used Subaru Impreza WRX STi
29 Great Deals out of 590 listings starting at $9,000
Used Nissan Rogue
587 Great Deals out of 75,164 listings starting at $3,495

Used Cars For Sale

2017 Subaru Forester For Sale
14,569 listings starting at $20,970
2016 Subaru Forester For Sale
40 Great Deals out of 1,313 listings starting at $16,999
2015 Subaru Forester For Sale
73 Great Deals out of 1,722 listings starting at $12,491
2014 Subaru Forester For Sale
46 Great Deals out of 1,533 listings starting at $8,900
2013 Subaru Forester For Sale
14 Great Deals out of 349 listings starting at $9,021