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  #1  
Old 11-26-2007, 12:08 PM
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Smile kinda new to site?

I have a 2003 6.0 fx4 crewcab, with S&B intake superchips flashpaq 1805 tuner, and flow through muffler (not 4 " exhaust) my ? is: egr (P0401) bypass or not.
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  #2  
Old 11-26-2007, 12:19 PM
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Not sure of your questuion but a p0401 is egr insufficient flow, your valve is probly just carboned up.
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Old 11-26-2007, 01:17 PM
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From what I've found:

If the Electronic Vacuum Regulator (EVR) duty cycle is very high (greater than 80% duty cycle), the differential pressure indicated by the DPFE sensor is evaluated to determine the amount of EGR system restriction. If the differential pressure is below a calibrated threshold, a low flow malfunction is indicated (P0401).

The DPFE sensor has two lines connected to exhaust ports, one to the exhaust stream and the other to the EGR exhaust feed. The DPFE sensor generates a 0 to 5 volt signal based on the differences between the two pressures.When the EGR is fl owing, that pressure will drop and the signal reading will be high. It is a typical three wire sensor with a signal, a 5 volt reference and a ground supply. Check for cracked or brittle lines before condemning the sensor. If the vehicle has a tube-mounted DPFE
sensor and one of these codes are present, the bulletin instructs the technician to install a new sensor. Ford has recognized a problem with these DPFE sensors. There is a redesigned sensor available.
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Old 11-26-2007, 11:33 PM
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Welcome to the site! Get rid of the superchips and get and SCT and turn the egr off or get it deleted.
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Old 11-27-2007, 10:03 AM
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Old 11-27-2007, 10:52 AM
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Welcome to Powerstroke.org
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  #7  
Old 11-27-2007, 12:40 PM
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Welcome to the ORG.!
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Old 11-27-2007, 12:58 PM
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Old 11-27-2007, 05:06 PM
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Welcome to the forum buddy!!!
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Old 11-27-2007, 05:17 PM
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