2005 Lincoln Navigator Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2005 Lincoln Navigator
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2005 Lincoln Navigator ProblemsCheck Engine Light Due to a PCV System Vacuum Leak
A vacuum leak from the PCV grommet vacuum leak can cause the Check Engine Light to illuminate. The molded rubber hose connections may crack and collapse, causing the vehicle to run roughly. A damaged PCV hose will require replacement.
In high dust areas, problems with the EGR system are common. The filter for the EGR solenoid may plug and cause the EGR to activate when it should not; this can cause the engine to stall. The dirty filter should be replaced to correct this concern.
2005 Lincoln Navigator QuestionsWhy does my hydraulic pump malfunction when it's cold? (1 answer)
It works fine when it's warm outside.