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05-24-2015, 07:29 PM
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#1 |
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Registered User
Join Date: Dec 2006
Location: Midlothian, TX
Posts: 87
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2004 5.3l Throwin codes P0401/P0402
Hey guys I mainly post over in the 73-87 and 67-72 section but I have an issue with my DD. I have a 2004 1500 5.3l and the CEL just came on. Checked the codes and they are P0401/P0402 for "EGR A Flow Insufficient"/EGR A Flow Excessive"
The problem is, my motor does not have an EGR valve installed from the factory. EGR vale is usually on the PS head forward of the oil cap. Anyone have any experience with this? FWIW the truck has 115K and has run like a champ since I bought it at 90K. There doesn't seem to be a change in anything since the code appeared. |
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05-24-2015, 08:23 PM
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#2 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 2004 5.3l Throwin codes P0401/P0402
I would try a different code reader, An '04 5.3L PCM doesn't support those 2 codes.
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05-24-2015, 08:47 PM
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#3 |
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Registered User
Join Date: Dec 2006
Location: Midlothian, TX
Posts: 87
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Re: 2004 5.3l Throwin codes P0401/P0402
Thanks. It was at O'reillys. I saw the codes on the screen. However, I'll give another shop a chance.
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05-24-2015, 08:54 PM
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#4 |
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Lurky lurky
Join Date: Sep 2005
Location: Maryville, TN
Posts: 553
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Re: 2004 5.3l Throwin codes P0401/P0402
I would guess they were 301 and 302, misfire codes. Never seen an EGR problem on a vehicle without an EGR valve
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05-24-2015, 09:01 PM
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#5 |
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Registered User
Join Date: Dec 2006
Location: Midlothian, TX
Posts: 87
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Re: 2004 5.3l Throwin codes P0401/P0402
Maybe it was leftover from a previous scan
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05-29-2015, 04:08 PM
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#6 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,217
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Re: 2004 5.3l Throwin codes P0401/P0402
you really need to find a different code reader there shoudl not be an egr code when the computer is not programed for it unless it has the wrong computer in it
__________________
David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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