Trouble codes P0496 and P0171

Tiny
BWHUOT63
  • MEMBER
  • 2012 CHEVROLET CRUZE
  • 1.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
I get the following codes:
P0496 and P0171.
Once both came one, other times only one will come on.

The last 3 times I filled the car with gas and go to start the car, the car will act like it's not getting enough gas. It eventually goes away but when I drive for a short time and turn off the car, it will keep running, but sluggishly.
Monday, September 6th, 2021 AT 9:38 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,101 POSTS
Hi,

The P0171 indicates a lean fuel mixture and code P496 is related to the canister purge valve which is part of the emissions system.

A lean mixture is usually the result of an engine vacuum leak. The two are likely tied together.

First, I attached a pic below. Open the hood and locate the component I highlighted. Check the vacuum hoses on both sides of that for damage, dry rot, being disconnected, or anything you feel could cause a leak. The component is the canister purge valve.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Let me know what you find or if you have other questions.

Take care,

Joe

See pic below.
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Monday, September 6th, 2021 AT 7:43 PM
Tiny
BWHUOT63
  • MEMBER
  • 15 POSTS
No leaks found, replaced the purge valve and it seems to be fixed now.
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Friday, September 10th, 2021 AT 2:07 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,101 POSTS
Hi,

I'm glad to hear it's fixed. The purge valve was likely stuck open causing a vacuum issue.

Regardless, I'm glad to hear it's fixed. Please feel free to come back anytime in the future if you have questions. You're always welcome here.

Take care,

Joe
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Friday, September 10th, 2021 AT 7:51 PM

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