Code 401 EGR Flow Insuf Problem, Please Help
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Junior User
Joined: Jan 2002
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From: Austin USA
Code 401 EGR Flow Insuf Problem, Please Help
1997 F150 4.9L
I have a check engine light with code P0401 (EGR Flow Insuf). I replaced the EGR valve (the intake was clear) and cleared the code.
The same code returned after about 20 minutes of driving. The truck does not appear to run different code or no code.
Is there a valve/soleniod the controls the vacuum to the EGR valve and how would I check/test it.
I have a check engine light with code P0401 (EGR Flow Insuf). I replaced the EGR valve (the intake was clear) and cleared the code.
The same code returned after about 20 minutes of driving. The truck does not appear to run different code or no code.
Is there a valve/soleniod the controls the vacuum to the EGR valve and how would I check/test it.
