EGR codes: P0403 & P0404 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 07-04-2009, 02:38 PM   #1
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Default EGR codes: P0403 & P0404

P0403 Exhaust Gas Recirculation (EGR) Solenoid Control Circuit
P0404 Exhaust Gas Recirculation (EGR) Open Position Performance

What should I check/replace with these codes?
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Old 07-04-2009, 03:30 PM   #2
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Check the connection to the EGR for corrosion. Also check for leaks on the EGR system. Remove EGR and check for open pintel.
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Old 07-05-2009, 07:45 AM   #3
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Default Location, location, location

Where do I find it? I have a good idea what it looks like.
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Old 07-05-2009, 08:43 AM   #4
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The EGR valve is right behind the throttle body near the brake master cylinder.
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Old 07-06-2009, 12:40 PM   #5
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Just like that the check engine light cleared. All I did was stare at it this morning.
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Old 07-06-2009, 02:41 PM   #6
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Let us know when it comes back.
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Old 07-06-2009, 06:14 PM   #7
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...and it'* back this afternoon :( Maybe a tap with a large hammer will work.
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Old 07-28-2009, 12:27 PM   #8
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Took it off, sprayed cleaner in it and it worked...for two days. Time to replace it.
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Old 07-28-2009, 02:24 PM   #9
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Sounds about right.
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Old 07-29-2009, 12:24 PM   #10
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Swapped EGR from No. 2 car. Error cleared.
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