Question about 2004 Nissan Murano
CODE PO420 CATALYST BELOW NORMAL BANK 1 .POSSIBLE CAUSE CATALTIC CONVERTER , WIRING , HO2S 2 HAVE VECHICLE PUT ON A SCANNER TO CHECK FUEL TRIM.A RICH FUEL MIXTURE WILL CAUSE THIS PROBLEM.MAKE SURE SPARK PLUGS AND WIRES GOOD AND FUEL INJCTORS ARE CLEANED NOT CAUSING ENGINE FLOODING MAKE SURE O2 SENSORS OKAY.IF YOU HAVE TO REPLACE THE CATALYTIC CONVERTER. AND FUEL SYSTEM STILL RICH IT WILL BURN OUT NEW CATALYTIC CONVERTER.YOU WILL BE REPLACING IT AGAIN.
Posted on Sep 05, 2010
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Posted on Jan 02, 2017
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