Check Engine Light
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Check Engine Light
I continue to get a check engine light with codes telling me it is in the egr system. I have already changed the DPFE sensor and the EGR valve, I have blown out the two rubber hoses that connect to the DPFE sensor and cleaned out as much of the throttle body I could without taking it apart. Any suggestions on what I should do next.
Postmaster
Joined: May 2003
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From: E.Lincoln County, NC
Originally Posted by pojda75
I continue to get a check engine light with codes telling me it is in the egr system. I have already changed the DPFE sensor and the EGR valve, I have blown out the two rubber hoses that connect to the DPFE sensor and cleaned out as much of the throttle body I could without taking it apart. Any suggestions on what I should do next.
Lead Driver
Joined: Sep 2006
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Testout:
EGR: Pull vacuum on the EGR with a hand pump or other method, while motor is running.
If motor get rough running, the EGR port is open enough.
DPFE: Orfice test. Pull the small hoses off. While engine is running, you should be able to feel exhaust escaping each small metal tube proving those are open.
Check over the metal tubes to be sure they are not rusted thru at any point.
Reassemble the DPFE with the correct hose sizes. Clear the code.
It takes 2 drive cycles to see if the code will come back. If so, replace the DPFE.
If the EGR control solenoid circuit is faulty, a different code would be set.
401 is low a flow test code.
EGR: Pull vacuum on the EGR with a hand pump or other method, while motor is running.
If motor get rough running, the EGR port is open enough.
DPFE: Orfice test. Pull the small hoses off. While engine is running, you should be able to feel exhaust escaping each small metal tube proving those are open.
Check over the metal tubes to be sure they are not rusted thru at any point.
Reassemble the DPFE with the correct hose sizes. Clear the code.
It takes 2 drive cycles to see if the code will come back. If so, replace the DPFE.
If the EGR control solenoid circuit is faulty, a different code would be set.
401 is low a flow test code.
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