What else could cause a P0171 code on a 2006 Equinox?

Asked by Sep 30, 2014 at 12:59 PM about the 2006 Chevrolet Equinox LT AWD

Question type: Maintenance & Repair

I changed the MAP and the MAF. I also changed the Evac canister purge valve. EGR valve is two years old.  The car has 112,000 miles. When I start the car, it runs very rough, but if I rev up to 4000 rpms, it will smooth out the idle and run fine. I have no hesistation, loss of power or any other issues.

6 Answers

222,985

Vacuum leak. Check all your hoses for cracks and whistling noises. You can have a smoke test performed at a local garage to find the leak as well.

2 out of 2 people think this is helpful.
17,870

Tom may be right but if that doesn't fix it try cleaning the throttle plate between the air box and the intake. They tend to get a sticky film build up on them and not close all the way. I've done that to a few over the years. It's worked every time.

1,065

Check the tube that goes from the air filter box to the firewall side valve cover. My wife was taking her 07 for oil changes and just about every time they would pop that tube out of the valve cover or break it. Once you put it back in if its out you should be able to clear the code

2 out of 2 people think this is helpful.

Was curious if you were able to clear this code since I'm in a similar situation with my '06. I see that your EGR was replaced a couple years prior to the P0171 so signal. Was the EGR Valve itself the only part replaced or was an aftermarket or new line and gaskets installed? Also, just wanted to see if a new module was used to connect the EGR. I have my new MAP and MAF sensors, and an aftermarket EGR Valve Kit in my garage right now and planning to start addressing this thing tomorrow! I'm getting the same DTC on my scan tool, P0171 in both banks, along with an EGR/VVT sensor stuck on 'Not Ready'. Thanks, Thomas

20

This is the answer: Follow the breather tube from the air duct that leads to the back side of the motor, by the fire wall. It comes out of it's hole whenever someone removes the air box cover to check the air filter. you can feel for it with your hand under the ignition coil pack to the driver side under the coil. plug it back in and reset the Check Engine Light (CEL) Here is a link that better describes it. http://www.greatautohelp.com/chevyanswers/2005-Equinox-p0171-p0496.html

2 out of 2 people think this is helpful.

I had my chevy same make. Model. Year and miles and my p0171 came on and I just replaces the hose that was attached to the pvc and it cleared my engine light. Can I still fail for that code if the engine light isn't on anymore?? Or it is cause I disconnected the battery.

Your Answer

Add photo

Related Questions

Equinox

Looking for a Used Equinox in your area?

CarGurus has 65,891 nationwide Equinox listings starting at $1,600.

ZIP:

Search Chevrolet Equinox Questions

Chevrolet Equinox Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,560
#2 FordNut
FordNut
Reputation 840
#3 David Scott
David Scott
Reputation 730
View All

Related Models For Sale

Used Ford Escape
1,119 Great Deals out of 90,859 listings starting at $1,295
Used Ford Edge
809 Great Deals out of 50,872 listings starting at $3,375
Used GMC Acadia
581 Great Deals out of 43,580 listings starting at $3,995
Used Honda CR-V
810 Great Deals out of 59,368 listings starting at $1,200
Used Ford Explorer
937 Great Deals out of 74,004 listings starting at $750
Used Toyota RAV4
643 Great Deals out of 61,990 listings starting at $2,450
Used Chevrolet Malibu
1,008 Great Deals out of 85,694 listings starting at $1,995
Used Kia Sorento
477 Great Deals out of 36,185 listings starting at $1,995
Used Jeep Grand Cherokee
843 Great Deals out of 68,691 listings starting at $864
Used Chevrolet Tahoe
776 Great Deals out of 28,447 listings starting at $1,500
Used Nissan Murano
363 Great Deals out of 22,821 listings starting at $1,800

Used Cars For Sale

2017 Chevrolet Equinox LT AWD For Sale
21 Great Deals out of 9,895 listings starting at $19,887
2016 Chevrolet Equinox LT AWD For Sale
63 Great Deals out of 1,461 listings starting at $14,999