Can a bad EGR valve cause a P0420 code?
It might be just the EGR ports are clogged . Its needs to be cleaned first before replacing EGR valve. P0420 code shows that your catalytic converter does not work as it supposed to . You should try a chemical first to clean converter if it wont help then converter needs to be replaced.
What is the signs of a bad catalytic converter?
Among the symptoms of a bad catalytic converter are:
- Sluggish engine performance.
- Reduced acceleration.
- Dark exhaust smoke.
- The smell of sulfur or rotten eggs from the exhaust.
- Excessive heat under the vehicle.
What does a P0420 code on a Prius mean?
This way if you get a code on your Prius, you will know just what to do. Here is what a P0420 code is and what you need to know to fix the root cause of it. The actual definition of a P0420 code is Catalyst System Efficiency Below Threshold (Bank 1).
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.
What does it mean if your check engine light says po420?
It is important to remember that if your “Check Engine Light” illuminates and someone just simply reads a code of PO420, 421, 430 or 431 this does not necessarily mean the Catalytic Converter is bad! All that code says is either Converter operating below efficency or Converter operating below threshold.
Why does my Toyota Prius not pass emissions?
The software in your vehicle believes that the catalytic converter is no longer doing its job. If your vehicle has the P0420 code, it won’t pass emissions so please be aware of that. The P0420 code in a Toyota Prius will often be thrown one of your oxygen sensors are not functioning properly.