Problem Reports
Mercury Mystique
Report: Check Engine Light Due to Plugged EGR Passage
Mercury Mystique Problem
4 Reports
Model Years Affected: 1999, 2000
Exhaust & Emissions Affected: 2.5L V6
Average Mileage: 130,000 mi (125,000 mi - 135,000 mi)
Verified
The Check Engine Light can illuminate with codes due to the lack of EGR (exhaust gas recirculation) flow caused. This is commonly a result of a clogged passage in the intake manifold. To correct this problem, the EGR valve has to be removed and the passage cleaned thoroughly. Partial restriction of this passage can cause smog test failures for the NOx emissions without causing a drivability symptom.
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