I have a 2007 Chevy Equinox about 104K mi. A couple weeks ago the check engine light came on and now it intermittently keeps stating Service Stabilitrak and Service Traction Control. Pull the codes and comes up with P0404, P0405, and P0171. I've seen some reports of the same thing and they said they replaced the EGR valve and it worked great. I replaced my EGR valve and the lights all went off for about a day. Another post I read said their may be a loose vacuum line. I can't find any. Does anyone have any advice?? I don't want to just replace parts at random. Thanks.

got_carquestions
50

Asked by got_carquestions Mar 08, 2013 at 06:35 PM about the 2007 Chevrolet Equinox LS

Question type: Maintenance & Repair

6 Answers

mrmoony
2,060

It could be that the passage that the egr valve is in, is plugged with carbon.

got_carquestions
50

I looked at the passage valve too. Looks like the EGR is working good. Now the only code that comes up is p0171, fuel too lean. Saw a lot of posts about cleaning mass air flow sensor or having a loose vacuum line. Checked all that and cleaned mass air flow. Even added some fuel system cleaner. Light was off for a bit, but the engine light came back on. Also, the service stabiltrak indicator came back on too.

1 out of 1 people think this is helpful.
David Scott
355

On our 07 equinox we occasionally get the P0171 and it has always been the fresh air pcv tube that runs from the air cleaner to the valve cover on the firewall side of the engine. When my wife was taking it to get oil changes they would man handle the air filter box and snap the tube off the valve cover. Sometimes it has been able to just be put back in other times it has needed replaced. I found it on Gmpartsdirect.com and the part number is 12602539. by that tube being off the engine will pull fresh air through it that is not metered by the mass air sensor and then on the radiator side of the engine there is the return air tube that connects to the intake manifold there fore bringing in air that is not metered by the mass air flow sensor.

4 out of 4 people think this is helpful.
got_carquestions
50

Thanks, but that tube is tight on both ends and no signs of holes or cracks. Still stumped....

mrmoony
2,060

Is something low on oil and exposing a sensor

mevbo
0

Thanks a bunch. I replaced both o2 sensors and the pcv tubing only to find this tubing loose at the engine side.....damm....it was my own doing too. I had just recharged the k&n......I must have knocked out loose then. ..

Your Answer

Add photo

Related Questions

  • on a 2007 Chevy Equinox, codes, po171, po404, and po405. Any clues? Thanks! 3 answers

    on a 2007 Chevy Equinox, codes, po171, po404, and po405. Any clues? Thanks!

    2007 Chevrolet Equinox LS

    -

    Maintenance & Repair

  • check engine light is on 4 answers

    Hi there I have a 2007 Chevy equinox, every time I accelerate on the highway and reach 75 mi/hr engine light come on and when I go down hill its start flashing then stop when driving on level roads....

    2007 Chevrolet Equinox LT3

    -

    Maintenance & Repair

  • on 2005 equinox abs keeps trying to cut on and abs light comes on...what might be the cause and remedy?? 5 answers

    Sometimes when brake pedal is depressed the ABS systems tries to engage.....there is a slight vibraton in brake pedal as this happens. The light sometimes comes on after this and sometimes later. Whe...

    2005 Chevrolet Equinox

    -

    Maintenance & Repair

  • removal PCV valve on Chevy Equinox 2005 6 answers

    I just need to know how to remove the PCV valve---Most of the time they just pull out but from what I could see in the dark there is a bracket but no way to remove the bracket

    2005 Chevrolet Equinox LS

    -

    Maintenance & Repair

  • 2007 Equinox 3.4 L engine 3 answers

    Just curious - looking at a 2007 Equinox and have been reading some reports about head gasket problems in the 3.4L engines. If it isn't caught in time the antifreeze can go into the oil and cause engi...

    2007 Chevrolet Equinox

    -

    Shopping & Pricing

Equinox
Looking for a Used Equinox in your area?
CarGurus has 55,189 nationwide Equinox listings starting at $2,997.
ZIP:

Search Chevrolet Equinox Questions

Chevrolet Equinox Experts

#1 Tom Demyan
Tom Demyan
Reputation 530
#2 geezz
geezz
Reputation 450
#3 Richard Power
Richard Power
Reputation 210
View All

Related Models For Sale

Used Ford Escape"
1,335 Great Deals out of 57,266 listings starting at $950
Used Ford Edge"
717 Great Deals out of 33,394 listings starting at $6,000
Used Honda CR-V"
712 Great Deals out of 52,188 listings starting at $1,400
Used GMC Acadia"
685 Great Deals out of 34,115 listings starting at $7,295
Used Toyota RAV4"
732 Great Deals out of 36,615 listings starting at $1,995
Used Kia Sorento"
546 Great Deals out of 28,402 listings starting at $1,999
Used Nissan Murano"
457 Great Deals out of 17,175 listings starting at $3,750
Used Jeep Grand Cherokee"
1,123 Great Deals out of 54,239 listings starting at $995
Used Chevrolet Malibu"
1,553 Great Deals out of 71,834 listings starting at $855
Used Nissan Rogue"
438 Great Deals out of 21,008 listings starting at $6,895
Used Hyundai Santa Fe"
445 Great Deals out of 23,350 listings starting at $1,825
Used Chevrolet Captiva Sport"
580 Great Deals out of 7,811 listings starting at $9,500
Used Ford Explorer"
964 Great Deals out of 49,596 listings starting at $1,000

Used Cars For Sale

2015 Chevrolet Equinox LS For Sale
8,194 listings starting at $23,500
2014 Chevrolet Equinox LS For Sale
13 Great Deals out of 1,134 listings starting at $17,800
2013 Chevrolet Equinox LS For Sale
27 Great Deals out of 547 listings starting at $14,450
2012 Chevrolet Equinox LS For Sale
41 Great Deals out of 565 listings starting at $11,690
2011 Chevrolet Equinox LS For Sale
31 Great Deals out of 511 listings starting at $10,668