Question about 2002 Ford Crown Victoria
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.
not likely the PCM, engine computer. they seldom go bad.
report back findings.
Posted on May 16, 2010
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Posted on Jan 02, 2017
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