I have a scan tool that says my egr valve system not ready on my Ford f150 5.4 and my catylist reads not ready how can I fix this problem
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
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.
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
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
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).
May 22, 2011 |
2001 Ford F150 Styleside SuperCrew