so i've had an SES code for awhile now, along with poor gas mileage (18.8), and i just recently got the scanner from our shop. i scanned the codes and it gave me two codes. A P0446 & P0446 (pd). both said "EVAP emission control system vent circuit malfunction" .... i have 0 idea where to go from here and i could definitely use some help guys. please and thank you. along with the ses, i am getting a service vehicle soon alert which i will address in another topic. thanks guys!

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2002 Bonnie SSEI debadged and pieced together.
Daily Driver. 46,xxx original
Alpine 136bt
JX 360/4, Kenwood 6x9, infinity 6.5
Pdx 1.1000 on a W7 12"

1996 Viper GTS - The Rare Drive
11k miles

Autonetworkinc.com .... go buy something ;)

I would start by inspecting the vacuume harness that connects from the TB, to the Evap sensor, LIM and around to the MAP and Fuel pressure Reg. common to have leaks.

_________________
Shane "RedZMonte"
2004 Z16 Z06: Virgin
2000 SSEi: Kenwood DDX512, 3.25" MPS, ZZP DP, PLog, Puck Mount, NGK TR7's, DHP Tuned
1995 Monte Z34: T04e "60" turbo, 42.5# injectors, Borla Catback, OBDII swap, DHP Tuned, Much more...

_________________
Shane "RedZMonte"
2004 Z16 Z06: Virgin
2000 SSEi: Kenwood DDX512, 3.25" MPS, ZZP DP, PLog, Puck Mount, NGK TR7's, DHP Tuned
1995 Monte Z34: T04e "60" turbo, 42.5# injectors, Borla Catback, OBDII swap, DHP Tuned, Much more...

You mean P0442 & P0446?

http://pontiacbonnevilleclub.com/forum/ ... 40#p208621

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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 Chevrolet Impala SS: LS4 V8, Victory Red
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck

No, both codes were P0446. So it is possible that all my problems could be from a loss of vacuum in the system?

_________________
2002 Bonnie SSEI debadged and pieced together.
Daily Driver. 46,xxx original
Alpine 136bt
JX 360/4, Kenwood 6x9, infinity 6.5
Pdx 1.1000 on a W7 12"

1996 Viper GTS - The Rare Drive
11k miles

Autonetworkinc.com .... go buy something ;)

I'll have to look up the specifics of it. P0440, P0442, and P0446 are all EVAP related codes that are the inverse of one another. One is for not being able to maintain pressure and decay at a predetermined rate, the other is that it won't vent at all when commanded to. I just never remember which is which.

_________________


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 Chevrolet Impala SS: LS4 V8, Victory Red
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck

check your other post for loss of boost. they are most likely all one problem. I posted the info on the vac harnesses and what not in the other post.

_________________
Shane "RedZMonte"
2004 Z16 Z06: Virgin
2000 SSEi: Kenwood DDX512, 3.25" MPS, ZZP DP, PLog, Puck Mount, NGK TR7's, DHP Tuned
1995 Monte Z34: T04e "60" turbo, 42.5# injectors, Borla Catback, OBDII swap, DHP Tuned, Much more...

Thank you guys. That would be great if it was all from these weathered hoses. I've told my step-dad about everything and we're going to look around for hoses and what not to see if that solves any problems. If after replacing the hoses, there is still problems, I will be back with more info

_________________
2002 Bonnie SSEI debadged and pieced together.
Daily Driver. 46,xxx original
Alpine 136bt
JX 360/4, Kenwood 6x9, infinity 6.5
Pdx 1.1000 on a W7 12"

1996 Viper GTS - The Rare Drive
11k miles

Autonetworkinc.com .... go buy something ;)

my supercharger problem is fixed. and i just replaced the purge solenoid, but to no avail. since it is most likely an electrical issue (circuit malfunction) what do i look for next? because nobody wants to bite the bullet and take it to a dealer

_________________
2002 Bonnie SSEI debadged and pieced together.
Daily Driver. 46,xxx original
Alpine 136bt
JX 360/4, Kenwood 6x9, infinity 6.5
Pdx 1.1000 on a W7 12"

1996 Viper GTS - The Rare Drive
11k miles

Autonetworkinc.com .... go buy something ;)