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.

5 Answers

210,455

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.
16,630

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.

995

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.

Your Answer

Add photo

Related Questions

Equinox

Looking for a Used Equinox in your area?

CarGurus has 70,970 nationwide Equinox listings starting at $2,500.

ZIP:

Search Chevrolet Equinox Questions

Chevrolet Equinox Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,460
#2 FordNut
FordNut
Reputation 790
#3 David Scott
David Scott
Reputation 670
View All

Related Models For Sale

Used Ford Escape
1,680 Great Deals out of 85,692 listings starting at $995
Used Ford Edge
1,160 Great Deals out of 52,084 listings starting at $2,995
Used Honda CR-V
1,261 Great Deals out of 74,066 listings starting at $1,650
Used GMC Acadia
1,022 Great Deals out of 40,735 listings starting at $3,505
Used Toyota RAV4
1,085 Great Deals out of 54,614 listings starting at $1,999
Used Jeep Grand Cherokee
1,137 Great Deals out of 70,002 listings starting at $495
Used Ford Explorer
1,448 Great Deals out of 72,827 listings starting at $985
Used Kia Sorento
563 Great Deals out of 33,854 listings starting at $1,999
Used Nissan Murano
441 Great Deals out of 22,237 listings starting at $1,800
Used Chevrolet Malibu
1,097 Great Deals out of 79,562 listings starting at $2,495
Used Hyundai Santa Fe
390 Great Deals out of 14,614 listings starting at $1,000
Used Chevrolet Tahoe
1,070 Great Deals out of 31,943 listings starting at $1,495

Used Cars For Sale

2017 Chevrolet Equinox LT AWD For Sale
10,378 listings starting at $20,298
2016 Chevrolet Equinox LT AWD For Sale
126 Great Deals out of 1,714 listings starting at $16,995