My s40 failed for 3 codes p0420,p0700,&p0705 I had a hole in the exhaust fixed & the 705 netutal safety code went away and the 420 code is pending will this code go away?

Asked by Feb 01, 2015 at 01:08 PM about the 2003 Volvo S40 1.9T

Question type: Maintenance & Repair

4 Answers

7,840

Codes like these need their tests run. Google them or seek the glossary and possible causes at enginecodes.com. codes that come and go have reasons why they set. they may return in some cases because healing is not something the vehicle can do.

10,800

since you fixed he hole in the exhaust, you may have fixed the problem. as long as you are not having drivability problems, turn the code off and see if it comes back. if so then you still have an issue.

63,065

The hole in the exhaust system was most likely allowing fresh air to be drawn in the exhaust system and past the downstream oxygen sensor. The computer saw this as a fluctuation of exhaust gasses which triggered the P0420 code. With the hole fixed the computer must run several diagnostic cycles before it determines the problem is fixed. Usually takes about a week of normal driving. Once this happens the check engine light will go off and the catalytic converter readiness monitor will set. Then you can pass inspection. While you're waiting for this to happen keep your gas tank between 3/4 and 1/4 full. No more and no less. This way all the tests will run, and you'll be good to go. HTH. -Jim

Best Answer
7,840

And you can save a week, by following the code read, pinpoints, and resetting the power supplied to it, a relearn would take a day . lets see what actually happens....let us know how it actually goes

Your Answer

Add photo

Related Questions

  • 2007 S40 timing belt broke 4 answers

    Hi All, 2 weeks ago I send my 2007 S40 with 122k mileage to a Volvo dealership, Volvo Of Dallas, for inspection check as the air con is not working well and also the engine check light came on. Af...

    2007 Volvo S40 2.4i

    -

    Maintenance & Repair

  • Yesterday I tried several times to start my 2001 S40 Volvo. It says "in service" and "check engine" 1 answer

    From yesterday, each time I start my car. the "in service" and "check engine" lights are on. What should I do to deal with this problem? Is it safe for me to drive on free way to have my car checked b...

    2001 Volvo S40 Turbo

    -

    Maintenance & Repair

  • Timing Belt or New Car? That is the Question. 7 answers

    I have a 2001 s40 with 71,000. It will cost $2800 to repair. I'd prefer to fix it, but not if it's going to open a whole new can of worms. Any advice is greatly appreciated.

    2001 Volvo S40

    -

    Maintenance & Repair

  • Volvo developed sluggish turnover. Why? 37 answers

    Has been getting worse by the day for past 2 weeks. Now almost not turning over. Recently administered transmission flush & (per service light) oil change and had battery tested. Those eliminated,...

    2003 Volvo S40 1.9T

    -

    Maintenance & Repair

  • Getting an '07 S40 2.4i, what should I expect? 7 answers

    I am in the market for a newer (2007 and up) used car. I came across a 2007 S40 2.4i. 85,000 miles (mostly hwy it looks like), clean carfax (3 owners though, 1 of which only had it for a month), look...

    2007 Volvo S40 2.4i

    -

    General

S40

Looking for a Used S40 in your area?

CarGurus has 1,101 nationwide S40 listings starting at $1,500.

ZIP:

Search Volvo S40 Questions

Volvo S40 Experts

#1 venom5150
venom5150
Reputation 690
#2 tenspeed
tenspeed
Reputation 350
#3 Tom Demyan
Tom Demyan
Reputation 340
View All

Related Models For Sale

Used Volvo S60
148 Great Deals out of 8,222 listings starting at $1,988
Used Volvo S80
26 Great Deals out of 935 listings starting at $2,200
Used Volkswagen Jetta
374 Great Deals out of 33,667 listings starting at $700
Used BMW 3 Series
1,113 Great Deals out of 35,574 listings starting at $900
Used Audi A4
205 Great Deals out of 11,130 listings starting at $1,333
Used Honda Civic
510 Great Deals out of 81,592 listings starting at $558
Used Honda Accord
739 Great Deals out of 82,789 listings starting at $500
Used Volvo XC90
93 Great Deals out of 6,095 listings starting at $1,995
Used Volvo C70
27 Great Deals out of 704 listings starting at $2,395
Used Nissan Altima
808 Great Deals out of 78,287 listings starting at $470
Used Volkswagen Passat
168 Great Deals out of 21,664 listings starting at $1,500
Used Toyota Camry
881 Great Deals out of 92,136 listings starting at $1,300

Used Cars For Sale

2011 Volvo S40 For Sale
38 listings starting at $5,650
2010 Volvo S40 For Sale
3 Great Deals out of 59 listings starting at $4,500
2009 Volvo S40 For Sale
77 listings starting at $4,900
2008 Volvo S40 For Sale
129 listings starting at $3,888
2007 Volvo S40 For Sale
4 Great Deals out of 193 listings starting at $3,500