What does P0420 mean on a Toyota Prius?
Tech notes As the code description implies the P0420 code means that the vehicle’s control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting).
What does the OBD-II P0420 error code mean?
The definition of the OBD-II P0420 code is “Catalyst System Efficiency Below Threshold (Bank 1)”. When the ECU stores this code, it means that the catalytic converter is not operating at maximum efficiency and may need replacement.
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.
Why do I need to resolve the P0300 code first?
For example, if you have these codes – P0300, P0420, P0171, then you’re going to want to tackle the P0300 Random Misfire code first (resolve it), and then tackle the P0420 code, etc. The reason for that is that the first code could be causing further DTCs to be set.
Where does the P0420 trouble code come from?
P0420 is triggered in the engine control module when there is a problem with the efficiency of the catalytic converter. The engine control unit uses two O2 sensors, one in the front of and one behind the catalytic converter to measure the efficiency of the catalytic converter.
What does it mean when your catalytic converter says p04020?
In most cases, the failing catalytic converter is not dangerous and poses no risk to the occupants of the car. The real risk is that serious damage to the catalytic converter may occur unless the P04020 code is resolved quickly.
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.
What is the trouble code for a GMC OBDII?
This page is meant to define the symptoms of the GMC P0420 trouble code. It covers GMC P0420 meaning, symptoms, causes, and possible solutions. GMC OBDII P0420 is often caused by a bad oxygen sensor, but there can be other causes as well. One of the most common trouble codes with all GMC vehicles is the P0420.
P0420 2008 TOYOTA PRIUS Tech Notes As the code description implies the P0420 code means that the vehicle’s control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting).
What is the trouble code on a Toyota Prius?
One of the most common trouble codes with all Toyota vehicles is the P0420. This code number references a number that is given to you when you plug your Toyota Prius into a OBDII scanner. It doesn’t matter which model you have, this OBDII code has the same meaning for all of them. P0420 is a OBDII trouble code.
Why does my Honda Accord have a P0420 code?
Then, the Check Engine Light is triggered, and you get a P0420 engine code. Many owners have reported P0420 for the following makes: Honda (especially on a Honda Accord), Chevrolet, Nissan, Ford, and Toyota. A faulty catalytic converter is the most frequent cause of a P0420 code. Common issues that can cause the P0420 code include:
Can a check engine light illuminate a P0420 code?
There are many issues that could trigger the Check Engine Light to illuminate. However, if you use an OBD-II scanner and get a P0420 code, you may be having issues with your catalytic converter. For a full rundown of what this code entails, read on. What is a Catalyst?