Can a bad PCV valve cause catalytic converter problems?
As you may know, a faulty or clogged PCV valve may cause the engine to consume oil due to a lack pressure relief. This may eventually cause problems with the catalytic converter as well due to the car’s inability to expel the exhaust gases properly.
What code will a bad PCV valve throw?
When the P0171-4 codes appear, it means the car’s computer is unable to make proper adjustments to control the air-fuel mixture, thus the car almost stopped. Too much fuel is going through the engine. The PCV valve is different than the valve cover. The PCV valve most likely connects to the valve cover on the engine.
What causes the P0420 code on a Toyota Yaris?
The P0420 code in a Toyota Yaris will often be thrown one of your oxygen sensors are not functioning properly. Typically, the code will be triggered by the upstream oxygen sensor (before the converter). There aren’t usually any drivability issues associated with P0420.
What is the trouble code on a Toyota Yaris?
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 Yaris 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. The code technically stands for:
What happens if your engine trips a P0420 code?
As a general rule, if your engine trips a P0420 code along with other upstream trouble codes, the problem you’re having likely isn’t related to the catalytic converter. However, if the P0420 code is the only trouble code – or if the other codes are all P042X codes – the likelihood of a failed catalytic converter is much higher.
Why does my Toyota Yaris 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 Yaris will often be thrown one of your oxygen sensors are not functioning properly.