Question about 2002 Ford Crown Victoria

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2002 Crown Victoria check engine light stays on

The check engine light on my 2002 Victoria is on and I was told the problem is an "insufficient airfflow 02 sensor EGR" I had the EGR valve and the EGR Selinoid changed, but the light is still on.

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Are you talking about insufficient egr flow? Possibly code p0401. it is probably your dpfe sensor .

Posted on Jul 08, 2009

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Also have them change the oxygen sensors, if it's deemed necessary. have someone reset the computer. if the light stays off, then you don't have to.

Posted on Jun 14, 2009

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Exhaust Gas Recirculation Flow Insufficient Detected 2002 Ford Crown Victoria LX The car works very good at 60 and I go 35 to city and then when we slow down to city speeds it will have little jerks and we...


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
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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.
not likely the PCM, engine computer. they seldom go bad.
report back findings.

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try the entire air intake for leaks.

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