It is currently Sat Apr 20, 2019 8:39 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 6 posts ] 
Author Message
PostPosted: Thu Mar 28, 2019 7:47 pm 
Offline
SE Member
SE Member
User avatar

Joined: Thu Mar 28, 2019 7:31 pm
Posts: 11
Year and Trim: 2005 Pontiac Bonneville GXP
I recently purchased a 2005 Bonneville GXP from a friend, who kindly explained everything he knew to be wrong with it. I fixed most of the little issues already. He told me it had a bad o2 sensor, and that's why the Service Engine Light was on, I took it to Autozone today, had them run their OBD2 tool, and came up with this:

P0171 System Too Lean (Bank 1)
P0174 System Too Lean (Bank 2)
P0455 Evaporative Emission System Leak Detected (gross leak/no flow)
P0442 Evaporative Emission System Leak Detected (small leak)
P0442 Evaporative Emission System Leak Detected (small leak)
P0741 TCC System Stuck Off - Mechanical (4T65-E)

*Yes, there was two of the exact same P0442 code on the scan, though I'm not sure why?

1. First question is, would/could all those EVAP leaks be related to each other, as well as the Lean Bank codes?
I pulled the beauty cover, looked around, shot some carb cleaner st every hose I could, and didnt notice an idle change at all. Gas cap seems tight. It's possible some sort of fuel tank exhaust line is broken, as there is a line under the carpet in the trunk that appears broken, I'll have to get a picture of it, but not sure if it could cause all those codes?

2. The TCC code kind of confuses me, as I was under the impression that the Northstar GXP cars came with a 4T80, not a 65? My build sheet (I emailed GM and got the original build sheet) has a code of MH1 and MX0 for transmission, but doesnt specify from what I can find, which it has. Also, there is no drivability issues whatsoever with the transmission. It shifts fine, the traction control turns on and off, and seems to be working as intended, and there are no lights that come up when flooring it and slipping, so I'm not sure if that's an erroneous code or not?

Mostly I'm just unsure of where to start with the vacuum leak codes? Any help anyone could provide, would be greatly appreciated!

_________________
Image
2005 Pontiac Bonneville GXP
White Gold TriCoat


Top
 Profile  
 
PostPosted: Fri Mar 29, 2019 11:55 am 
Offline
Certified Bonneville Nut
Certified Bonneville Nut
User avatar

Joined: Wed May 13, 2009 10:45 pm
Posts: 5591
Location: CHICAGO
Year and Trim: 2006 STS-V, 2004 GTO, 2009 G8 GT
P0171 (and 174)

bonneville-gxp-northstar-powered-cars/topic30881.html?hilit=p0171

P0455 and 442 answered at a high level here;

post447739.html?hilit=p0455#p447739

P0741

bonneville-gxp-northstar-powered-cars/topic51329.html?hilit=p0741

1) EVAP codes can work in tandem and yes it could drive the lean codes.
2) The code is a generic titled GM code and can flag if the fault is there regardless of actual transmission as both most likely use the same base program table.

_________________
Image

Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2015 Chrysler Town & Country Limited Platinum: Mommy's NEW RGC
2007 Chrysler Town & Country Limited: Daddy's beater affectionately called the Rolling Garbage Can or "RGC" for short
2009 Pontiac G8 GT: L76, Sport Red Metallic
2009 Chevrolet Impala SS: LS4 V8, Victory Red
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck


Top
 Profile  
 
PostPosted: Fri Mar 29, 2019 4:08 pm 
Offline
SE Member
SE Member
User avatar

Joined: Thu Mar 28, 2019 7:31 pm
Posts: 11
Year and Trim: 2005 Pontiac Bonneville GXP
Thank you for the links! I had already read through the 741 one for transmission, and the 442 one, but hadn't seen the 174 one. I did take a picture of the line I had a question about, that's in the trunk. I hooked it back up, after work I can run it again and see if it makes a difference. I just gotta figure out how to post a picture to show the line I'm talking about, I'm sure you could tell me exactly what for.

_________________
Image
2005 Pontiac Bonneville GXP
White Gold TriCoat


Top
 Profile  
 
PostPosted: Fri Mar 29, 2019 4:10 pm 
Offline
SE Member
SE Member
User avatar

Joined: Thu Mar 28, 2019 7:31 pm
Posts: 11
Year and Trim: 2005 Pontiac Bonneville GXP
Image

_________________
Image
2005 Pontiac Bonneville GXP
White Gold TriCoat


Top
 Profile  
 
PostPosted: Sat Mar 30, 2019 1:51 am 
Offline
Resident Gearhead
Resident Gearhead

Joined: Wed Apr 01, 2009 7:11 pm
Posts: 2461
Location: Alberta, Canada
Year and Trim: 2004 GXP, 2008 STS, 2008 DTS
That is a rear sunroof drain and will not cause any of your DTC's. Of course it will cause you other water leak related problems. You can simply use something like a wire tie/tie-wrap to fix it. If necessary, there is also information on the numerous water leaks these cars suffer and how to fix them (including the sunroof drains - most notably the front drains).

_________________
Image

Bose Luxury Sound System w/Touch Screen Navigation, Addition of Factory XM, 2005 MY Antenna, OnStar Upgrade (3G),
RainSense Wipers, Backup Camera, '00 Style Door Panel Courtesy Lights, Heated Washer Solvent, 2X Remote Trunk Release,
Turn Signal Mirrors, Center Console Courtesy Lamp, Rear Outboard Heated Seats, PVD Chrome 18" Factory Rims, Upgraded
Carbon Fibre Appearance Interior Trim, Highly Modified Main Body Harness, Instrument Panel, Door, Door Panel & Headliner
Wiring Harnesses, Custom Fuse Box & Tire and Loading Information Decals, Additional Acoustic Insulation


Top
 Profile  
 
PostPosted: Sat Mar 30, 2019 10:07 am 
Offline
SE Member
SE Member
User avatar

Joined: Thu Mar 28, 2019 7:31 pm
Posts: 11
Year and Trim: 2005 Pontiac Bonneville GXP
Thank you for clarifying what that line was! I was hoping it was something to do with the EVAP codes, but I guess I'll do some more digging to try and find the problem.

I was browsing these forums when I first started looking at buying this car, and was impressed at the knowledge you all have. I am happy for the internet and places like this! Hopefully I can contribute something someday!

Speaking of which: I'm not sure if I found it on this forum, or somewhere else, but if you email socialmedia@gm.com they will gladly send you an original build sheet, with RPO codes. I asked about production numbers, but they dont have that info. In either case, if that info isnt somewhere on this forum, let me know and I'll make a new thread, or a mod could put it somewhere so others could find it.

_________________
Image
2005 Pontiac Bonneville GXP
White Gold TriCoat


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 5 hours [ DST ]


Related topics
 Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. New GXP Owner

kheflw

18

1836

Sat Aug 27, 2016 11:35 pm

CMNTMXR57 View the latest post

There are no new unread posts for this topic. New 2005 GXP Owner

[ Go to pageGo to page: 1, 2 ]

Reb0urne

21

1711

Sun Sep 07, 2014 12:42 am

techweenie View the latest post

There are no new unread posts for this topic. Greeting: new GXP owner here

Gregsgroup

3

727

Mon Jul 30, 2018 9:25 pm

nos4blood70 View the latest post

This topic is locked, you cannot edit posts or make further replies. Hello from a fellow GXP owner..

Specter GXP

1

1101

Wed Feb 16, 2011 9:35 pm

willwren View the latest post

There are no new unread posts for this topic. where to get an owner's manual

Plasmaburn

10

2875

Mon Jun 28, 2010 10:27 am

Plasmaburn View the latest post

 


Who is online

Users browsing this forum: DougC and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group


phpBB SEO