Question about 2005 Dodge Caravan

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DODGE CARAVAN PO405 CODE

IT WILL NOT TURN OFF

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  • dwarrenss454 Jan 22, 2009

    I CHANGED EGR

  • Richard Delahant May 11, 2010

    What will not turn off? The check engine light?

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2005 dodge caravan po404 and po405 , changed egr valve an had only po405. now listen heres the punch line disconnect the battery and touch the cables together to drain the capacitors for 30 secs.reconnect an BAM po405 is gone if it dont work ill give you your money back.

Posted on Jan 24, 2009

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P0405 Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low Voltage
There may be no symptoms of a P0404 DTC other than the MIL (malfunction indicator lamp) or check engine light. However, Exhaust Gas Recirculation systems are inherently problematic due to carbon buildup in the intake manifold, etc. This normal buildup can lodge in an EGR valve, holding it open when it should be closed. If this is the case, the engine may idle rough, or not at all. If the valve has failed and is NOT opening, then symptoms would be higher combustion temps and as a result, higher Nox emissions. But the latter symptoms aren't going to be noticeable to a driver.
Possible Causes:

  • Short to ground in EGR signal or Reference circuits
  • Short to voltage in EGR ground or signal circuits
  • Bad EGR valve
  • Bad PCM wiring issues due to chafing or loose terminals

Posted on May 20, 2013

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The pcm will turn light off within a few days after egr valve replacement if the egr valve was the reason for the po405 code being set. Give it a few days and see. i f not then there may be a problem with carbon buildup under the egr valve in the cylinder head

Posted on May 31, 2009

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