Question about Cars & Trucks
Rather then replacing a bunch of parts , take it and have a Catalytic converter efficiency testing done . P0420 is a Catalytic converter efficiency code http://www.obd-codes.com/p0420 P0420 How To Diagnose Bad Catalytic Converter EricTheCarGuy
Posted on Jan 02, 2017
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Posted on Jan 02, 2017
CODE PO420 CATALTYLIC CONVERTER SYSTEM FAULT.ITS SAYING FAULTY CATALTYLIC CONVERTER.IF IT BEEN A WHILE IF YOUR CAR HAS A WHOLE LOT OF MILES ON IT.YOUR SPARK PLUG CHANGE IS DUE AT 120000 MILES. DUE A LITTLE TUNE UP CHANGE AIR FILTER AND FUEL FILTER.SEE IF YOU HAVE ANY ENGINE FAULTS BAD PLUGS DIRTY INJECTORS ANY THING UP SET FUEL SYSTEM CAUSE CAR TO RUN RICH.EXCESSIVE UNBURN FUEL WILL GATHER IN CATALYTIC CONVERTER CAUSE IT TO BURN OUT.SHORTING LIFE OF THE CATALYTIC CONVERTER.
Posted on Aug 30, 2009
your bank 1 sensor is on your driver side..if you get up under the car and see were your exhast pipes come from the engine you will see it all u have to do is disconect the wire connector and its either a 21mm or a 18mm wrench to take it off.....if you need any other info or a picture of it just let me know
Posted on Mar 28, 2010
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P0420 indicates the computer thinks the catalytic converter isn't working as well as it should. This is determined by the PCM evaluating the switch rate of the front and rear o2 sensors. Once the rear o2 sensor switch rate reaches a point close to the front o2 sensor it sets the code. This can be a result of degenerated catalytic converter, or in some rare instances, bad o2 sensors. In most cases repairing this condition requires replacing the catalytic converter with an OEM unit. Aftermarket converters don't have the same quality and quantity of the precious metals that make up the substrate found inside. This usually results in the code setting again in just a few months.
Posted on Oct 04, 2010
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