#2010 honda accord 3.5 bank 2 convertor pro#
#2010 honda accord 3.5 bank 2 convertor code#
#2010 honda accord 3.5 bank 2 convertor free#

Unauthorized or illegal exhaust system modifications or alterations.

Use of enhanced or unauthorized PCM programming.

Mechanical issues in the engine, such as excessive wear of cylinders/piston/piston ring/valve gear that cause excessive oil consumption.

#2010 honda accord 3.5 bank 2 convertor free#

Restrictions anywhere in the exhaust system that prevents or inhibits the free flow of exhaust gas.Exhaust leaks in exhaust components such as exhaust manifolds, down pipes, balancing tubes, flexible hoses/pipes, and mufflers.Failures and/or malfunctions in almost any system, sensor, or component that affects/controls/monitors/regulates combustion, and therefore, exhaust emissions.Premature failure of rebuilt or refurbished catalytic converters.Catalytic converter failure due to long use.

#2010 honda accord 3.5 bank 2 convertor code#

The most common causes of code P0420 are many and varied, but could include the following. What are the common causes of code P0420? Note the arrow that indicates the direction of gas flow. The image below shows the typical position of a catalytic converter on Bank 1, as well as the locations of the #1 and #2 oxygen sensors. When this happens, the PCM will set code P0420, and illuminate warning light.Д¬atalytic converters generally resemble exhaust mufflers, and they are fitted into the exhaust system upstream of the actual mufflers. However, should the PCM detect that the signal voltage pattern from the downstream oxygen sensor closely matches that of the upstream sensor, it will interpret this condition to mean that the catalytic converter is operating below a minimum allowable efficiency threshold. In practice, the PCM continuously compares the signal voltages from the upstream and downstream sensors, taking into account the expected variations in the composition of the exhaust stream during normal driving. 9 volt several times per second, the signal voltage reading from the downstream sensor will remain fairly constant at around the midway mark, provided the throttle position does not change. While the signal voltage from the upstream oxygen sensor fluctuates between about 0.1 volt and. In a fully functional system, the upstream oxygen sensor both controls and monitors short-term fuel trims by reacting to changes in the levels of oxygen in the exhaust stream, while the downstream sensor monitors the efficiency of the catalytic converter, and is (with a few exceptions) not directly involved in fuel trim control. Thus, to be able to monitor the efficiency of a catalytic converter, the PCM uses input data from both the upstream and downstream oxygen sensors, or on some applications, the air/fuel ratio sensors. Typical examples would be using unsuitable or poor quality fuel, excessive oil consumption, persistent misfires, over fuelling, and several others. It must be noted though that while catalytic converters are designed to have long service lives, there are many factors that can severely reduce both its efficiency and service life. NOTE: Catalysts are substances that are not consumed in the process of transforming chemical substances or compounds into another substance or compound, such as turning oxides of nitrogen into water, oxygen, and other innocuous substances. Depending on the design of the converter, the substrate is coated with a variety of precious metals that act as catalysts when the exhaust stream passes through the substrate. Essentially, a catalytic converter contains a honeycomb, or other type of structure (aka вЂњsubstrate) that allows the exhaust stream to pass through the body of the converter. While catalytic converter designs have evolved greatly from when they were first introduced, their basic operating principles remain the same. However, this process can only be initiated when the catalytic metals in the converter are at a very specific minimum temperature, which varies according the converter design, and the type of catalyst used. The purpose of the catalysts in a catalytic converter is to break down harmful exhaust emissions, such as oxides of nitrogen (NOx) and others, by a process of oxidization that depends on complex chemical reactions that are controlled (or triggered) by the catalytic metal(s) in the converter. Note that on engines with two banks of cylinders, вЂњBank 1вЂќ refers to the bank of cylinders that contains cylinder #1. OBD II fault code P0420 is a generic code that is defined as вЂњCatalyst System Efficiency Below Threshold (Bank 1)вЂќ, and is set when the PCM (Powertrain Control Module) detects a condition that indicates that the catalytic converter on Bank 1 is operating below the minimum allowable efficiency threshold.

#2010 honda accord 3.5 bank 2 convertor pro#

We recommend Torque Pro What Does Code P0420 Mean? Catalytic converter system, bank 1 -efficiency below threshold