2004 5.3l Throwin codes P0401/P0402 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

conman585 · 05-24-2015, 07:29 PM

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.

05-24-2015, 07:29 PM	#1
conman585 Registered User Join Date: Dec 2006 Location: Midlothian, TX Posts: 87	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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