KOEO Code 334 EGR Closed Voltage High
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Posting Guru
Joined: Jul 2004
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From: Cottage Grove, WI
KOEO Code 334 EGR Closed Voltage High
Hey, checked my codes and this one came up. Should I be looking at the EGR Valve, the position sensor, or something else all together? Diagnostics is not my strong suit on these gas engines.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
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From: Kentucky
Put a meter on the EVP feedback signal, verify what it is. Then I suggest to remove the EGR valve and inspect it. Many times Code 334 is caused by carbon build up on the EGR pintle seat. The carbon keeps the EGR from fully closing which in turns makes the EVP signal too high when it is supposed to be closed.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
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