Can P0420 cause misfire?
Another thing that can happen is the converter can plug up and cause a false P0420 code in the computer. This usually happens when the engine has had a misfiring or rough running in the past and the customer continues to drive the vehicle for a long period of time.
What are the symptoms of a P0420 trouble code?
Possible Symptoms. You will probably not have any symptoms except check engine light by just the P0420 code itself, and you may have other problems with your engine that is damaging the catalytic converter that can have symptoms like rough idle, rough acceleration, misfires, and hard shifting.
What does P0420 mean on a catalytic converter?
P0420 means that the efficiency of the catalytic converter is below the threshold. The ECM uses two O2 sensors, one in the front and one in the back of the catalytic converter to measure the efficiency. If the efficiency is low, the P0420 code will be triggered.
Can a misfire code tell you what causes a rough idle?
Although the misfire codes don’t tell you what exactly is the cause of the misfire or rough idle condition, there is a way to find out exactly what is causing it. One of the most important things you need to know, to successfully diagnose a misfire or rough idle condition, is what causes a misfire.
What causes the O2 sensor to show the code po420?
Rich or lean mixtures can damage the catalytic converter, and when the catalytic converter is damaged/filled with fuel, the efficiency will be low, and the rear O2 sensor will see that and show the trigger the code Po420.
Possible Symptoms. You will probably not have any symptoms except check engine light by just the P0420 code itself, and you may have other problems with your engine that is damaging the catalytic converter that can have symptoms like rough idle, rough acceleration, misfires, and hard shifting.
Although the misfire codes don’t tell you what exactly is the cause of the misfire or rough idle condition, there is a way to find out exactly what is causing it. One of the most important things you need to know, to successfully diagnose a misfire or rough idle condition, is what causes a misfire.
P0420 means that the efficiency of the catalytic converter is below the threshold. The ECM uses two O2 sensors, one in the front and one in the back of the catalytic converter to measure the efficiency. If the efficiency is low, the P0420 code will be triggered.
What causes rough idle / acceleration in a car?
Mass Air Flow (MAF) sensor is the cause of rough Idle/Acceleration 80% to 90% of the time. My car ran a lot better after this video, but Every once in a while I would still get some chugging – I ended up buying a used MAF sensor at a junk yard. It had low miles on it for about $25. So far it has been running smooth.