If the dealer refuses or says that your Contour is not covered under the warranty, you may want to try some of these suggestions from the TSB. Bank 2 Precat is the one near the radiator.
P0430 - Catalyst System Efficiency Below Threshold (Bank 2).
Indicates Bank 2 catalyst system efficiency is below the acceptable threshold.
�· Malfunctioning ECT/CHT
�· High fuel pressure
�· Damaged exhaust manifold
�· Cylinder misfiring
�· HO2S wiring concerns (shorted or chafed, bent pins, etc.)
�· Damaged exhaust system pipe
�· Damaged muffler/tailpipe assembly
�· Retarded spark timing
Damaged Catalytic Converter:
�· Use of leaded fuel
�· Oil contamination/consumption
�· Silicone contamination (sealants/cleaners)
