P1406 Digital EGR - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-17-2007, 01:15 AM   #1
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Default P1406 Digital EGR

Well, I have been getting the EGR pintle performance code for awhile now. I removed the EGR, and before cleaning in the pintle moved plenty freely. I cleaned it anyway, and installed a new gasket, and I'm still getting the P1406 code randomly.

So is it safe to say my EGR is shot? Will running with a broken EGR cause any problems? Performance? Mileage? Where should I look for another?

Thanks Guys.
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Old 01-17-2007, 04:24 AM   #2
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Do you have 5 volts power going to it?
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Old 01-17-2007, 09:10 AM   #3
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You don't have a digital EGR. You have a linear EGR. And the Linear'* don't respond to cleaning as well as the Digitals. This is typically a remove and replace kinda thing.

It can cause driveability, performance, mileage, and emissions issues.

Here'* your compatibility list:

Quote:
Buick Century
1997-2002
3.8L Eng Valve, EGR


Buick LeSabre
1996-2003
Valve, EGR 00-01


Buick Park Avenue
1996-2003
Valve, EGR 97-01

1991-1996
w/Supercharger Valve, EGR 96

1991-1996
w/o Supercharger Va ...

1991-1996
w/o Supercharger Va ...

1995
Normally Aspirated


Buick Regal
1988-1999
3.8L Eng 1996 Valve, EGR

1997-2003
3.8L Eng Valve, EGR 97-01


Buick Riviera
1995-1999
w/Supercharger Valv ...

1995-1999
w/o Supercharger Valve, EGR

1995
Normally Aspirated


Chevrolet Impala
2000-2003
3.8L Eng Valve, EGR 00-01

2000-2001
3.8L Eng


Chevrolet Lumina
1995-1999
3.4L Eng 1996-97 Valve, EGR

1995-1999
3.8L Eng 1998-99 Valve, EGR

1996-1997
3.4L Eng

1998-1999
3.8L Eng


Chevrolet Monte Carlo
1995-1999
3.4L Eng 1996-97 Valve, EGR

1995-1999
3.8L Eng 1998-99 Valve, EGR

2000-2003
3.8L Eng Valve, EGR 00-01

1996-1997
3.4L Eng

1998-2001
3.8L Eng


Oldsmobile Cutlass Supreme
1988-1997
3.4L Eng 1996 6 Cyl Valve, EGR

1996
3.4L Eng


Oldsmobile Eighty-Eight
1996-1999
All applications

1995
Normally Aspirated


Oldsmobile Intrigue
1998-2002
3.8L Eng Valve, EGR

1999
3.8L Eng


Oldsmobile LSS
1996-1999
All applications


Oldsmobile Ninety-Eight
1996
All applications

1995
Normally Aspirated


Oldsmobile Regency
1992-1998
w/o Supercharger Va ...

1992-1996
w/o Supercharger Va ...


Pontiac Bonneville
1996-2002
Valve, EGR 00-01

2000-2003
Valve, EGR 00-02

1995
Normally Aspirated


Pontiac Grand Prix
1990-1996
3.4L Eng Valve, EGR 96

1997-2002
w/Supercharger 3.8L ...

1997-2002
w/o Supercharger 3.8 ...

1996
3.4L Eng

1997-2001
3.8L Eng
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Old 01-17-2007, 11:47 AM   #4
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When I had this code it was solved by replacing 15 Amp fuse on passenger site,but if your cruise control works,then it'* not the fuse.
It'* #5 fuse on my 1995 SSEi and it'* in cirquitry of EGR,Evapor purge solenoid,cruise control and boost control solenoid.
In my case all of above didn't work properly.
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Old 01-18-2007, 12:40 AM   #5
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Thanks for the info boss. That is quite the list...I'm sure I can find one at the wreckers.

A new AC Delco unit is around $150.
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Old 02-24-2010, 05:32 PM   #6
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My 1996 just threw the P1406 code, and I found this thread under a search. Weird thing is, mine will clear itself and the car will run normally after a few shut downs and re-starts.
It'* happened before, though- car suddenly starts running real roughly, check engine light comes on. Guess I definitely need an EGR valve, new or used. Any issues taking a chance on a used one?
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Old 04-26-2010, 03:04 AM   #7
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Question about EGR replacement: are the two bolts that attach it prone to rust and seizing? Do they usually come off easily, or have people snapped them when loosening?
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Old 05-03-2010, 03:24 PM   #8
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OK, I guess it'* not an issue...just a fresh gasket and good to go?
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Old 05-03-2010, 03:32 PM   #9
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Dunno, please...feel free to start your own thread that isn't 3 years old and post your issues so we can help you with the most current info/knowledge that we have.

Not sure what you are trying to do... only assumption I can make is you have a P1406, which could be a map sensor or other things.
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