Codes Again
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Joined: Jul 2004
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Codes Again
P0171 - System Too Lean Bank 1
P0401 - Insufficient EGR Flow
Im lost as how to how to fix these codes. theyve both been present since i bought the truck and ive already replaced both upstream o2 sensors, cleaned the egr valve itself, replaced the egr tube, cleaned the egr port on the intake, cleaned the throttle body and intake as well. im lost now as to what to do, any help is appreciated.
This is what ive come up with after researching a little deeper:
P0171
Check PCV hoses for leaks
Clean MAF sensor
P0401
Replace Fuel Filter
Replace DPFE sensor
P0401 - Insufficient EGR Flow
Im lost as how to how to fix these codes. theyve both been present since i bought the truck and ive already replaced both upstream o2 sensors, cleaned the egr valve itself, replaced the egr tube, cleaned the egr port on the intake, cleaned the throttle body and intake as well. im lost now as to what to do, any help is appreciated.
This is what ive come up with after researching a little deeper:
P0171
Check PCV hoses for leaks
Clean MAF sensor
P0401
Replace Fuel Filter
Replace DPFE sensor
Last edited by Firefighter8-1; Aug 21, 2004 at 10:33 PM.
