PO403 EGR Solenoid control circuit? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-29-2007, 10:22 PM   #1
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Default PO403 EGR Solenoid control circuit?

OK, got this code yesterday when I scanned, and turned it off. Came back this afternoon.

I pulled the EGR valve and wirebrushed some carbon off the pintle nose and the flange, looked down into the two holes, and don't see any obstruction or excess carbon buildup. I reinstalled the connector using dielectric grease (it was dry), erased the code, and now the light'* still out after an hour drive.

Anything else to do? I checked the archives and it seems to me (there'* not much) that this code is complaining about the circuit, not the EGR valve itself.

Anything else to do, or do I just wait and see if the CEL lights up again?
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Old 11-30-2007, 01:06 AM   #2
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Wait and see if you get the light again..

You may be in need of replacement

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Old 11-30-2007, 04:39 PM   #3
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Quote:
Originally Posted by jr's3800

You may be in need of replacement
Of what? The EGR valve or the harness?

Talk about a simple job. 30 seconds, off and on for the valve.
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Old 11-30-2007, 05:19 PM   #4
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I think possibly the EGR Valve its self..

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Old 11-30-2007, 05:22 PM   #5
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Quote:
Originally Posted by jr's3800
I think possibly the EGR Valve its self..
No CEL yet. We'll see.
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Old 11-30-2007, 05:33 PM   #6
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Makes me wonder what kind of issue its having.. Keep driving it...

Car still runs good right?

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Old 11-30-2007, 10:38 PM   #7
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Quote:
Originally Posted by jr's3800
Makes me wonder what kind of issue its having.. Keep driving it...

Car still runs good right?
Yeah, runs fine. I just seafoamed it last weekend. I wonder......?
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