If the voltage of the downstream O2 sensor is constantly jumping between 0.1V and 0.9V, the catalyst is worn and the catalytic converter needs to be replaced. The downstream O2 sensor produces a relatively steady voltage reading of approximately 0.45V if the catalytic converter is functioning properly. I Need Some Help Right Away Have A 2000 Van Honda Odysey 3 5 Is Not Ping. P0420 2007 Toyota Highlander Code Catalyst System Efficiency Below Threshold Bank 1. My 2003 Honda Accord Ex 5 Sp E Up With Codes P0420 P0141 From Research This Seems To Be Very Mon For.

With the Honda running and at normal operating temperature, use the digital multimeter to check the voltage reading of the downstream O2 sensor. /rebates/2fb2fCatalytic-Converters-for-2010-for-Honda-Accord2f336292fbn87761678&252fb252fCatalytic-Converters-for-2010-for-Honda-Accord252f33629252fbn8776167826tc3dbing-&idebay&nameEbay&ra1. P0420 Catalytic Converter System Bank 1 Efficiency Below Threshold Honda Troublecodes.

If any leaks are found, repair the leak, clear the code, and complete several drive cycles to verify that was the fix. Pay close attention to the exhaust manifold, gaskets, and exhaust pipes pre-catalytic converter.

Examine the exhaust system for damage and leaks.

If other codes are present, they must be addressed first.

Scan your Honda to verify P0420 is the only code present.

Honda P0420 Diagnosis Tools Needed to Diagnose: If any other codes are present, they should be addressed first. Honda Code P0420 Common Diagnosis Mistakesĭo not overlook other codes that are paired along with P0420. There is a factory service bulletin (A17-036) for the following Honda models: - 20162017 Honda Pilot. If the P0430 code is combined with other codes, try fixing the other codes first. It is recommended that you address P0420 as soon as possible to keep the cost of the repair to a minimum. Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases, the catalytic convert needs to be replaced to fix the problem. While P0420 does not pose a danger to the driver and may not produce any symptoms with issues related to drivability, it can cause severe damage to other components of your Honda if not addressed in a timely manner. Honda Odyssey 3.5 V6 Bank 1 and Bank 2 and Rear Catalytic Converter 2005 2006 2007 2008 2009 2010.

Worn and internally failing catalytic converter.

Code P0420 indicates that the catalytic converter is not functioning efficiently, therefore increasing the output of harmful pollutants by your Honda. The function of the catalytic converter is to break down harmful pollutants that are created by your Honda during the combustion cycle and convert them into harmless gases.

Catalyst system efficiency below threshold (Bank 1).

2010 honda accord 3.5 bank 2 convertor