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That's not what this code is about .P0401 - EGR Flow Insufficient Detected . Probably clogged egr passages . P0401 - EGR Flow Insufficient Detected
The EGR system is monitored during steady state driving conditions while the EGR is commanded on. The test fails when the signal from the DPF EGR sensor indicates that EGR flow is less than the desired minimum.
Vacuum supply
EGR valve stuck closed
EGR valve leaks vacuum
EGR flow path restricted
EGRVR circuit shorted to PWR
VREF open to D.P.F. EGR sensor
D.P.F. EGR sensor downstream hose off or plugged
EGRVR circuit open to PCM
VPWR open to EGRVR solenoid
D.P.F. EGR sensor hoses both off
D.P.F. EGR sensor hoses reversed
Damaged EGR orifice tube
Damaged EGRVR solenoid
Damaged PCM
Perform KOER self-test and look for DTC P1408 as an indication of a hard fault. If P1408 is not present, look for contamination, restrictions, leaks, and intermittents.
This DTC says nothing about changing the sensor or the connector or pig tail ! It's a circuit voltage low code P0405 - DPF EGR Sensor Circuit Low Voltage Detected
See DTC P1400
Problem with wiring or PCM ! P1400 - DPF EGR Sensor Circuit Low Voltage Detected
The EGR monitor checks the DPF EGR sensor signal to the PCM for low voltage. The test fails when the average voltage to the PCM drops to a voltage less than the minimum calibrated value.
DPFEGR circuit short to GND
Damaged DPF EGR sensor
VREF short to GND
Damaged PCM
A DPF EGR PID reading less than 0.2 volt with the key ON and engine OFF or running, indicates a hard fault.
P1404 is an EGR code for this application! (P1404 EGR Valve Closed Position Performance). You should clean the EGR valve and then there is a procedure to reset the learned voltage value,
it may be alright but it has to relearn the voltage! To do this : The
code sets if the PCM sees voltage that is more than 0.29 volts above the
learned minimum. The engine needs to be
RUNNING when the DTC is cleared. Clearing the DTC also triggers the
closed EGR minimum voltage relearn. If you clear the DTC with the key
on, engine off, the voltage may be high enough when the engine is
running to trigger the code again.
ABout EGR codes, there are alot choive to look or diagnostic... are you chec or replace
the vacuum lines as well? If there is a leak, the DPFE will read
incorrectly.
Did you reset the PCM or disconnect the battery after the repair? Assuming all fuses are good, the P1401 indicates a possible wiring
fault. Check the connector. Is it clean? Is it pushed in all the way?
Are the wires in good condition?
Since the DPFE has been replaced, likely there is a restriction in the
EGR line some where. This could also be a bad EGR valve. But first
ensure that the EGR valve vacuum line is attached and leak free.
If no problem found, then the EGR passageways in the throttle body
should be cleaned. Carbon will build up and block the EGR flow.
If still no problem found, consider replacing the EGR valve.
Keep in mind this information from Ford Service CD...
P0401 - EGR Flow Insufficient Detected
The EGR system is monitored during steady state driving conditions while
the EGR is commanded on. The test fails when the signal from the DPF
EGR sensor indicates that EGR flow is less than the desired minimum.
Vacuum supply
EGR valve stuck closed
EGR valve leaks vacuum
EGR flow path restricted
EGRVR circuit shorted to PWR
VREF open to D.P.F. EGR sensor
D.P.F. EGR sensor downstream hose off or plugged
EGRVR circuit open to PCM
VPWR open to EGRVR solenoid
D.P.F. EGR sensor hoses both off
D.P.F. EGR sensor hoses reversed
Damaged EGR orifice tube
Damaged EGRVR solenoid
Damaged PCM
Perform KOER self-test and look for DTC P1408 as an indication of a hard
fault. If P1408 is not present, look for contamination, restrictions,
leaks, and intermittents
P1401 - DPF EGR Sensor Circuit High Voltage Detected
The EGR monitor checks the DPF EGR sensor signal to the PCM for high
voltage. The test fails when the average voltage to the PCM goes to a
voltage greater than the maximum calibrated value.
DPF EGR circuit open
VREF short to PWR
Damaged DPF EGR sensor
DPFEGR circuit short to PWR
SIG RTN circuit open
Damaged PCM
A DPF EGR PID reading greater than 4.5 volts with the key ON and engine OFF or running, indicates a hard fault.
Hope this helps (remember to rate and send us your comments about this answer).
well you could remove it and put a hose on it and either **** on it or hook it up to a vacuum and see if it moves up and down, if it don't move it has a bad diaphram
An egr valve {exhaust gas recirculation} allows exhaust gases to enter the intake manifold at cruise conditions and keeps the cat. convert. from overheating. It also keeps NOX to a minimum. Hope this helps.
You probably pulled a code p0401, insufficient egr flow. Your DPFE sensor is more than likely at fault. There has been a lot of trouble with these sensors. Then reset CEL or disconnect battery for 5 minutes.
Hello do you have engine service light on and if so was it scaned with OBD 2 scaner to retreve this fault "EGR" service eng light would be on if EGR is at fault! did you change your oil before E test and what is your milage on this car and do you know if you engine is a long "BLOCK" or short Block"
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