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Catalytic converters in any car rarely fail and should outlast the life of the car…a P0420/0430 is an effect and not the cause…before replacing the cat I’d have a diagnostic shop see if you have any issues that may have set that code…how do you know you don’t have an exhaust leak ??…excessive blow by or over fueling can also destroy your cat.
Catalytic converters in any car rarely fail and should outlast the life of the car…a P0420/0430 is an effect and not the cause…before replacing the cat I’d have a diagnostic shop see if you have any issues that may have set that code…how do you know you don’t have an exhaust leak ??…excessive blow by or over fueling can also destroy your cat.
Actually converters can fail early when the crack and break up. It is not impossible for them to fail as any part.
Also lean conditions, rich conditions, anti freeze head gasket leak. A bad o2 can send a 430 code.
But over filling a tank will not hurt a converter. It can damage a Evap system.
I just have read post on here with a number of failed concerts at low miles over the years. I just want yo see if there was an issue or if it is a normal thing.
I have no blow by, no coolant loss no failed plugs none of the normal causes. It just come on now and then. I just ran it in the garage and no light even reving the engine.
I had said “over fueling” and not “overfilling” will cause a P0420/0430…over fueling is a rich condition…if you have a scan tool and know how to perform a propane enrichment test you should try that….do you know how to tell with a scan tool if you have a good cat efficiency looking at your O2 sensors ??…good luck and hope your new converter fixes your car…it is NOT a normal thing.
Sometimes a converter gets just weak enough to cause a code. If a new O2 sensor doesn't correct the code try using an O2 extension sold at most auto parts stores to move the sensor out of the airflow some. These are nothing more than sparkplug antifoulers as seen here, just choose the correct thread size on the package:
They should outlast the duration of typical car ownership, but not the life of the car. Most people do not keep their cars for 25 years.
I have seen new cars with converters that came apart and blow like a ribbon to the muffler. We put a new converter on and never another issues.
There are no perfect parts. I just found it funny that a good number of C5-7 Corvettes getting this code and seeing a number of different issues. All appear on bank 2.
I am going to inspect the wiring and may swap the left to the right and right to the left and confirm this way converter or sensor. I also will Pyro gun and check temps. I ordered the parts but can cancel if they I find a simple issue.
The car runs fine no misfires and no coolant or oil use. No over rich or lean conditions. Only sense of anything wrong is the light.
I did find a mouse nest in the heater duct when I bought it so I need to check the wires for possible damage. I have not seen any wire damage to this point but I did not check the O2 sensors.
They should outlast the duration of typical car ownership, but not the life of the car. Most people do not keep their cars for 25 years.
If the converter is getting the correct feed gases the converter should last that long….my old SUV I had since new had close to 400,000 miles on it and the cats were still fine.
If the converter is getting the correct feed gases the converter should last that long….my old SUV I had since new had close to 400,000 miles on it and the cats were still fine.
I agree some parts can be defective. But agree with C5 Diag that it isn't normal. Maybe not common is better terminology. I had a '95 Grand Cherokee with a 318 (5.2l) V8 that went 350,000 miles with totally all original exhaust system. In Michigan, no less!!!
Much of what destroys or dud destroyed Converters were oils. The additives that preserved the cam lobes the phosphates would destroy converters. Every engine leaks a small amount of oil down the valve guide to lube the valve. That bit used to do dsmagge till a few years ago.
but simple things like a plug wire bad. Failing O2 or injector csn take out converters. While a few go a long way the still decline in effectiveness.
Nothing us forever and with many variances in play many things can happen.
If charging us judt tight and temps hood a battery can last a long time. I had a Delco go 18 years before I changed it due to pushing my luck. Some times you just get lucky.
How many have gotten a code 430 at low miles?
