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Code P1409 for a 2002 Ford Taurus indicates an issue related to the EGR (Exhaust Gas Recirculation) system, specifically that the EGR valve is stuck open or there is a problem with the EGR control circuit. This can lead to increased emissions and poor engine performance. Common causes include a faulty EGR valve, vacuum leaks, or problems with the EGR control solenoid. It's advisable to inspect the EGR system components and associated wiring for faults to resolve the code.

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5mo ago

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