SES Light

[Elton]

P0430
The PCM system has determined that the catalyst efficiency for bank 2 is below threshold for the current engine operating conditions.

(Bank 1 identifies the cylinder #1. while bank #2 identifies the cylinders on the opposite bank)

So what does that mean? Any help will be greatly appreciated!! Thanks!

The rough idle has returned to normal and there is plenty of POWER in acceleration. No noticeable engine problems at all. 150k+ miles.

[nailfoot]

It means either you need new O2 sensors, or the catalytic converters are toast.

[Fordace]

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)



:eek: