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Nothing should be overlooked as catalytic converters are far too expensive to install one when it is not needed, you need to go to basics and check everything.
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A loose post catalyst sensor can cause it. Even simple things like an exhaust leak between the pre-catalyst and post catalyst sensors. To perform this job correctly you should look at the items that could have caused the reported DTC. Even excessive carbon can stop its function or stop it up entirely.Ĭontaminants are such a problem for catalytic converters that the state of California has added an opacity test to their emissions testing.Įxcessive heat is also a problem and can literally melt the converter internally. Any coating like excess fuel, coolant, oil, etc reduces the converters capability and thus causes its failure. Each piece of the “honey comb” is coated with a very thin coating of precious metals that performs its’ function. Let’s discuss Catalytic Converter construction from a very simplistic point of view!Ĭatalytic Converters are designed internally like a “honey comb”, the reason for this is it increases the available area for the reduction of pollutants. None of the states have data separated to show what the retest failure rate of the DTC P0420 is, but many state administrators state emphatically that the number one complaint of motorists references the P0420.
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Of that 9%, 1 in 5 (20%) vehicles fails the retest. Currently the emissions test failures average about 9% of the vehicles tested. You can just about be sure that you will get a recheck on this vehicle.Īccording to several states that have emission testing programs in place, emission failures are down y/y. Otherwise if you simply replace the converter, send the vehicle out…the odds on you misdiagnosing the problem or failing to correct the real problem just went straight up.
#FORD ENGINE CODES P430 CODE#
This stored Diagnostic Trouble Code (DTC P0420) is not definitive enough to just replace the parts based upon its’ indication.Ĭatalytic Converters are NOT wear out type parts and as such one that has failed should be highly suspect as to what caused it and more so IF it is truly bad. This Diagnostic Trouble Code (DTC P0420) relates to the efficiency of the catalytic converter on Bank 1.