Question about 2005 Mercury Mountaineer
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Posted on Jan 02, 2017
SOURCE: egr problem
Check the passages under the airhorn. When carbon builds up the diagnostic blames the EGR for not opening and throws a code. Actually there is no flow to the EGR because the port is clogged and the diagnostic measures the flow after the EGR.
They really needed to have a sensor before and after the EGR. Also remember to disconnect the battery for 10 minutes to remove old info.
Posted on Sep 24, 2009
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