08 PONTIAC G6 READING P0171 AND P0496

Also including Oldsmobile, Geo, Hummer, and Saturn (North American brands)
MUSICCRAZY32
Posts: 7
Joined: Tue Mar 14, 2017 8:14 am

08 PONTIAC G6 READING P0171 AND P0496

Postby MUSICCRAZY32 » Tue Mar 14, 2017 8:21 am

OK, THIS IS ACTUALLY MY FRIEND'S CAR, BUT SHE'S GETTING NOWHERE WITH MULTIPLE MECHANICS AND THEIR SCAN TOOLS. THERE'S A LITTLE HESITATION AT AROUND 15 MPH WHILE ACCELERATING, AND IT SOMETIMES STALLS WHEN TURNING OR SITTING AT A LIGHT. IT DOESN'T USUALLY SPUTTER WHEN IT STALLS, IT JUST DIES. SO FAR, COILS, SPARK PLUGS AND WIRES HAVE BEEN REPLACED, THE COMPUTER HAS BEEN REPLACED. ALTERNATOR AND BATTERY CHECK OUT FINE.
IV'E HEARD THE FUEL PUMPS ON THESE CAN BE A NIGHTMARE DUE TO A PLASTIC PIECE IN THEM, BUT COULD IT JUST BE THE MAF OR O2 SENSOR? HELP!


kev2
Posts: 6522
Joined: Sat Aug 29, 2009 4:24 pm

Re: 08 PONTIAC G6 READING P0171 AND P0496

Postby kev2 » Tue Mar 14, 2017 8:38 am

Stop changing parts - that gets expensive...

To get started - which engine, knowing that info can be more detailed to specific vehicle.
P0171* is a very common code - system is running lean.
P0496** EVAP Flow During Non-Purge Condition- this is likely your issue as it would cause above code and poor engine performance - rough idle, stumbling and stalls.

*https://www.obd-codes.com/p0171
**https://www.obd-codes.com/p0496

I would look at purge valve, sticking open causing A vacuum leak.
The vacuum leak would set p0171.
some Thoughts -
do not continue to refuel 'top off" the tank, this can cause Purge valve issues.
Use correct parts, AC Delco - the cheap aftermarket parts are problematic.

PS - all caps are seen as YELLING in the forums - be mad but use lower case :)

MUSICCRAZY32
Posts: 7
Joined: Tue Mar 14, 2017 8:14 am

Re: 08 PONTIAC G6 READING P0171 AND P0496

Postby MUSICCRAZY32 » Tue Mar 14, 2017 8:41 am

kev2 -
Lol Sorry about the all caps, I have to use them at work and didn't even think about it.

I'm just relaying all the stuff she's had done in the last month, so ya'll have a clear picture. I told her to have someone check the purge valve, she hasn't done that yet. Thank you so much for the quick response!! I'll post an update when I know something... She also pulled the MAF sensor just to check it, looks brand new, so don't think that's the issue.

MUSICCRAZY32
Posts: 7
Joined: Tue Mar 14, 2017 8:14 am

Re: 08 PONTIAC G6 READING P0171 AND P0496

Postby MUSICCRAZY32 » Tue Mar 14, 2017 8:48 am

So she said the shop told her they 'cleaned' the purge valve Saturday.

kev2
Posts: 6522
Joined: Sat Aug 29, 2009 4:24 pm

Re: 08 PONTIAC G6 READING P0171 AND P0496

Postby kev2 » Tue Mar 14, 2017 9:36 am

Has there been an issue after they cleaned the purge?
I am guessing you do not have a scan tool -
We could unplug purge, confirm no vacuum thru purge to EVAP system - drive under conditions that normally cause the stall.
The EVAP system (purge*) would code and hopefully the no stalling would isolate a purge valve issue. Would check valve seating and wiring.

* P0443, p0444, p0445

MUSICCRAZY32
Posts: 7
Joined: Tue Mar 14, 2017 8:14 am

Re: 08 PONTIAC G6 READING P0171 AND P0496

Postby MUSICCRAZY32 » Tue Mar 14, 2017 10:07 am

Yes, it's still doing the same thing. If they didn't actually test the vacuum seal, would it matter if they cleaned it or not?

Is the "purge valve" we're referring to the one by the tank or the one in the back of the engine (I tried to look up part locations, but got two different photos and the names aren't exact so I'm not sure what I'm looking at)

kev2
Posts: 6522
Joined: Sat Aug 29, 2009 4:24 pm

Re: 08 PONTIAC G6 READING P0171 AND P0496

Postby kev2 » Tue Mar 14, 2017 10:32 am

Purge is often on engine - BUT

I am still in dark as to which engine there are 3 or 4 options for this vehicle.

MUSICCRAZY32
Posts: 7
Joined: Tue Mar 14, 2017 8:14 am

Re: 08 PONTIAC G6 READING P0171 AND P0496

Postby MUSICCRAZY32 » Tue Mar 14, 2017 12:30 pm

oh! sorry. I'ts the 4 cylinder engine, and the car is not the gt or gtx model

kev2
Posts: 6522
Joined: Sat Aug 29, 2009 4:24 pm

Re: 08 PONTIAC G6 READING P0171 AND P0496

Postby kev2 » Tue Mar 14, 2017 1:05 pm

check attachment- next to oil fill cap...
Attachments
PURGE 2.4L.GIF
PURGE 2.4L.GIF (29.71 KiB) Viewed 252 times

MUSICCRAZY32
Posts: 7
Joined: Tue Mar 14, 2017 8:14 am

Re: 08 PONTIAC G6 READING P0171 AND P0496

Postby MUSICCRAZY32 » Tue Mar 14, 2017 1:07 pm

Got it... thank you!

kev2
Posts: 6522
Joined: Sat Aug 29, 2009 4:24 pm

Re: 08 PONTIAC G6 READING P0171 AND P0496

Postby kev2 » Tue Mar 14, 2017 1:28 pm

MUSICCRAZY32
Remember bagpipes are gods gift to music lovers.

MUSICCRAZY32
Posts: 7
Joined: Tue Mar 14, 2017 8:14 am

Re: 08 PONTIAC G6 READING P0171 AND P0496

Postby MUSICCRAZY32 » Fri Mar 17, 2017 6:06 am

hahahaha... nice... she got it fixed, it was indeed the purge valve...it wasn't sealing /had a leak


Return to “GM: Chevrolet, GMC, Buick, Cadillac”



Who is online

Users browsing this forum: No registered users and 0 guests