1999 Mercury Mystique codes are: P0420 Cadillitic Under Thresh Hold Bank 1, P0430 Cadilitic Under Thresh Hold Bank 2, & P1519 Intake Manifold Runner Control. What do they mean?

Asked by Oct 01, 2014 at 07:13 PM about the 1999 Mercury Mystique 4 Dr LS Sedan

Question type: Maintenance & Repair

Service engine light is on & it is a V6

1 Answer

97,135

Fix the P1519 first, if the control valve is stuck open it could cause the cats to run too cold so they won't reach threshold temps for proper operation.

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