SOURCE: 2003 Lincoln LS code P1406
Hi........
On your LS.
The CODE P1406,
IS Mean: Differential Pressure Feedback egr. problem.
Ok.. Is just the definition for your code.
The DPFEGR.. is a Little BOX. Black Colour.
Is Normally connected to the EGR tube coming from the EXUAST MANIFOLD. with 2 small hoses.
Inspect the Hoses for broken, burn or stuck with carbon.
if you DON'T found nothing wrong.
Replace the DPFEGR. You van get from DEALER.
DON'T get from autoparts because they only offer one
UNIVERSAL. and most cases don't work right.
Ok.. I hope this help to try to fix your car.
Thank you for use fixya..
SOURCE: ASM EMISSIONS TEST RESULTS - CODE P1406
P1406 - EGR (Exhaust Gas Recirculation) Valve Pintle Position Circuit
You most likely have either a defective EGR position sensor or a peice of carbon holding the EGR pintle valve off it's seat.
SOURCE: my check engine light came on 2004 ford taurus had
P174 means Oxygen sensor was slow in switching Single, Right
or Rear HO2S - Fuel control
P171 means Oxygen sensor not switching - system was at adaptive
limits - Single, Right or Rear HO2S - Fuel control
Visit http://www.troublecodes.net/Ford/
for a comprehensive code listing for your car.
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SOURCE: wath P1406 Code means on a GMC jimmy 1996,
It's an egr valve problem (exhaust gas return) egr position sensor.
Take off the egr valve and turn it over and see if there is carbon build up in the ports, if there is clean it out with a pipe cleaner and a little carbon cleaner, just spray a little into the ports and clean it out. If that doesn't cure the problem, then either the sensor needs replacing, and or the egr valve.
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