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?

Mary Stevens

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


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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