Another code ?
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Freshman User
Joined: Sep 2003
Posts: 49
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From: Ohio
Another code ?
My service engine soon light came on the other day, so I got the superchips micro tuner out and did a test. It said PO401 and that is exhaust gas recirculation flow insuff detected. My ? is what the heck does that mean? Thanks
Posting Guru
Joined: Apr 2003
Posts: 1,089
Likes: 1
From: Michigan
Originally Posted by MXZX1100cc
My service engine soon light came on the other day, so I got the superchips micro tuner out and did a test. It said PO401 and that is exhaust gas recirculation flow insuff detected. My ? is what the heck does that mean? Thanks
Post Fiend
Joined: Jan 2002
Posts: 5,859
Likes: 7
From: USA
Its usually the dpfe sensor ,either the vacum tubes are clogged or broken /leaking vacum.or the sensor is bad or no voltage for the circuit.
The egr could also be bad ,but highly unlikely.
Can be tested with a handheld vac pump.
p0401 is insuffiecnt egr flow ,that is measure by the dpfe sensor signal
Rich
The egr could also be bad ,but highly unlikely.
Can be tested with a handheld vac pump.
p0401 is insuffiecnt egr flow ,that is measure by the dpfe sensor signal
Rich
Posting Guru
Joined: Apr 2003
Posts: 1,089
Likes: 1
From: Michigan
Originally Posted by FortyFords
Its usually the dpfe sensor ,either the vacum tubes are clogged or broken /leaking vacum.or the sensor is bad or no voltage for the circuit.
The egr could also be bad ,but highly unlikely.
Can be tested with a handheld vac pump.
p0401 is insuffiecnt egr flow ,that is measure by the dpfe sensor signal
Rich
The egr could also be bad ,but highly unlikely.
Can be tested with a handheld vac pump.
p0401 is insuffiecnt egr flow ,that is measure by the dpfe sensor signal
Rich
Junior User
Joined: Jun 2004
Posts: 58
Likes: 1
From: Butte, MT
Originally Posted by MXZX1100cc
My service engine soon light came on the other day, so I got the superchips micro tuner out and did a test. It said PO401 and that is exhaust gas recirculation flow insuff detected. My ? is what the heck does that mean? Thanks
Last edited by cpufed; Sep 20, 2006 at 07:59 PM.
