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Had to make a hard stop in heavy rain due to a negligent driver. It was P0420, which turned out to be a very popular code for all Honda Accords. 5L v6 with 118,000 miles. ” It indicates that the exhaust system’s oxygen levels are below the required threshold in Bank 1, which can … The most common causes of code P0420 on late model Honda applications are engine vacuum leaks and fuel trim issues. The way the ECM … Engine Code P0420: O2 Sensor or Catalytic Converter? Got this code on my son’s 2012 Accord SE with 228,400 miles; Catalyst System Efficiency Below Threshold Bank 1. used furniture on craigslist You might be now scratching your head thinking of the faulty P0420 Honda Accord 2007. Advertisement The 1975 Honda. mover the past week I have cleaned both o2 sensors, downstream and upstream I then cleaned the MAF sensor and ran two bottles of cataclean. Our mechanic Andy says the reason the 2009 Chevy Malibu he works on in the video below has a P0420 code is that the two o2 sensors’ readings are off, and detect an issue in the catalytic converter. l home depot 3 If you find a P0420 code in your Subaru or Honda, it’s most likely the catalytic converter to blame. A failing oxygen sensor or bad catalytic converter are the most common causes of P0420. I have a P0420 code on a 2010 Honda Accord V6. I discovered today that I have a small exhaust leak at the flex pipe. What Does Code P0420 Mean? OBD II fault code P420 is a generic code that is defined as “Catalyst System Efficiency below Threshold Bank 1”, and is set when the PCM (Powertrain Control Module) detects that the catalytic converter on bank 1 is operating below a minimum allowable efficiency threshold. 37mm grenade launcher pistol JOIN GASDIESEL GARAGE AS WE DIAGNOSE AND REPAIR THE MOST COMMON CHECK ENGINE LIGHT TROUBLE CODE P0420 Catalyst Efficiency Below Threshold Bank 1 SENSOR 2 ON. ….

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