Question about 2005 Nissan Pathfinder
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Posted on Jan 02, 2017
Catalytic converters should last the life of the vehicle. usually they are damaged be a poorly running engine. most common causes are lean misfire causing unburnt fuel and air to get into the convert and ignite there. coolant or oil burning. engine running too hot (lean) overheating converters.
was it the same converter that went twice? did they change them at the same time? where the pre-converters? is the engine light on?
Posted on Jun 26, 2009
A plugged catalytic converter would result in a lack of power. Usually very consistantly. A more likely option would be the ignition module or crankshaft position sensor but not absolute. Below are possible causes of the code P0430:
Air leaks at the exhaust manifold or in the exhaust pipes
Catalytic converter is damaged, contaminated or has failed
Front HO2S or rear HO2S is contaminated with fuel or moisture
Front HO2S and/or the rear HO2S is loose in the mounting hole
Front HO2S older (aged) than the rear HO2S (HO2S is lazy)
The failure of the cat is likely as a secondary failure, not as a cause. Look at items such as worn plugs which would result in insufficient ignition and excessive fuel being pumped into the cat to cause it's failure. In turn causing excessive heat which can cause electronics failures. One thing you can do, is run the vehicle for about 15-20 minutes at highway speeds and stop and look under the vehicle(while the engine is running) and see if the cat is glowing. If it is glowing, replace the cat and have the plugs looked at. How has the other maintenance been(filter, fluids, etc.)? One other thing that can be done is have a scanner hooked to the system and have the O2 sensors read as live data to determine the current function.
Posted on Aug 26, 2010
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