P0404 EGR Valve

Discuss your 2000-2005 Bonneville SE, SLE, SSEi, Buick Le Sabre 00-05 and Buick Park Avenue 97-05. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.
Post Reply
bslayer
SLE Member
SLE Member
Posts: 66
Joined: Sat Jun 19, 2010 1:00 pm
Year and Trim: 2001 se

P0404 EGR Valve

Post by bslayer »

Hello all, I am getting a p0404 code.this pertains to the egr valve. My question is, is this common for the valves to go bad? Do you think I could just clean it? These are fairly expensive to replace. Any input is appreciated.
User avatar
harofreak00
Administrator
Administrator
Posts: 26022
Joined: Mon May 19, 2008 6:04 pm
Year and Trim: 2004 GXP - plus a handful of other Bonnevilles
Location: Browerville, MN
Contact:

Re: P0404 EGR Valve

Post by harofreak00 »

You can try cleaning it first, otherwise I sell them for $30 for a good used one.
Andrew - owner/operator of Bonnevilles Unlimited
Image
2004 Bonneville GXP | 60k | White Gold Tricoat | custom built supercharged 3800 hot rod | garage queen
1997 Corvette | 57k | Silver Metallic | Z06 wheels | Date-night Hauler/Parts runner
2014 Town & Country Limited | Cashmere Pearl | 115k | Family Hauler
2002 Ram 1500 Quad Cab Sport | Black| 280k | Official Bonneville Hauler
bslayer
SLE Member
SLE Member
Posts: 66
Joined: Sat Jun 19, 2010 1:00 pm
Year and Trim: 2001 se

Re: P0404 EGR Valve

Post by bslayer »

If I take the egr valve off and spray PB Blaster or some sort of solvent into the bottom and let it sit, will it ruin any other part of it?

Harofreak, if my cleaning does not work, I will order a used one next week. I am working on two different vehicles right now and am getting real tired of running to parts store to get codes read. I am ordering this today, and hopefully This will be adequate for my use and I can get some things fixed around here.

http://www.walmart.com/ip/Equus-3150-In ... r/14644661

P.S. Is there a way that the EGR valve can be tested?
User avatar
DASHAWN1234
SLE Member
SLE Member
Posts: 59
Joined: Fri Sep 30, 2011 11:43 am
Year and Trim: 2005 PONTIAC BONNEVILLE SLE

Re: P0404 EGR Valve

Post by DASHAWN1234 »

No egr valves cant be tested
00Beast
Retired Site Developer
Retired Site Developer
Posts: 20960
Joined: Tue May 27, 2008 10:30 pm
Year and Trim: '17 Silverado 1500
Location: MN/IA
Contact:

Re: P0404 EGR Valve

Post by 00Beast »

The Tech II scanner the dealer has can cycle it and see if the valve is actually doing what it needs to, but no you can't really test them yourself. Cleaning them is best done with carburetor cleaner, and be sure to replace the gasket.
Bye Bye:
Image
RIP sandrock
Sirius wrote:Think about it. You’re tooling down the road in your Prius, knowing full-well that this thing being green is as big a sham as federally mandated ethanol-enriched gas, Russia pulling out of Ukraine, and Obamacare.
Post Reply