What causes the p0446 trouble code on a GMC Sierra?
When the EVAP control system vent control circuit no longer responds to the ECU, it will throw the P0446 OBDII Code. There are many things that can cause the P0446 trouble code to trigger in your GMC Sierra.
What is the trouble code on my GMC Sierra?
P0446 GMC Sierra. One of the most common trouble codes with the GMC Sierra is the P0446 code. This trouble code references a number that is given to you when you plug your Sierra into a OBDII scanner. P0446 Indicates that there is a fault in the evaporative emission control system. It often appears with other codes, such as P0420, P0441, or P0440.
What does the OBD-II error code p0446 mean?
This generic OBD-II code indicates that the evaporative vent valve in the emission control system is malfunctioning. When this occurs, the EVAP system may not be capable of pressurizing and maintaining a vacuum seal. Find out more about the most likely OBD-II scanner error code P0446 problem and related repairs. What Does the Code P0446 Mean?
Is there a P0420 code on my GMC Yukon?
P0420 is another common trouble code that accompanies P0446. P0446 code will typically not be accompanied by any noticeable symptoms. The service engine soon light will come on, but that is usually about it. You might (not very likely) notice a slight decrease in fuel economy. P0446 may also cause a slight gas smell.
When the EVAP control system vent control circuit no longer responds to the ECU, it will throw the P0446 OBDII Code. There are many things that can cause the P0446 trouble code to trigger in your GMC Sierra.
P0446 GMC Sierra. One of the most common trouble codes with the GMC Sierra is the P0446 code. This trouble code references a number that is given to you when you plug your Sierra into a OBDII scanner. P0446 Indicates that there is a fault in the evaporative emission control system. It often appears with other codes, such as P0420, P0441, or P0440.
What does the OBDII code p0446 stand for?
P0446 is a universal OBDII trouble code. This means that regardless of which make or model of vehicle, the code will mean the same thing (Silverado or not). The code technically stands for:
P0420 is another common trouble code that accompanies P0446. P0446 code will typically not be accompanied by any noticeable symptoms. The service engine soon light will come on, but that is usually about it. You might (not very likely) notice a slight decrease in fuel economy. P0446 may also cause a slight gas smell.
How is the p0446 GMC evaporative emission vent system performance?
The Powertrain Control Module (PCM) monitors the performance of the Evaporative Emission (EVAP) system by applying a predetermined level of vacuum to the EVAPsystem then monitors the vacuum decay rate. P0446 GMC More Information Need more information on how to fix the P0446 GMC code? Get Access to Factory Service Manuals Need more help?
What does the p0446 code on a canister mean?
The vent valve will remain mechanically open in those cases, which will vent the canister all the time – setting a different code, such as a P0455. The P0446 is more likely to be a mechanically stuck closed vent valve or a mud dobber nest in the vent.
The Powertrain Control Module (PCM) monitors the performance of the Evaporative Emission (EVAP) system by applying a predetermined level of vacuum to the EVAPsystem then monitors the vacuum decay rate. P0446 GMC More Information Need more information on how to fix the P0446 GMC code? Get Access to Factory Service Manuals Need more help?
This generic OBD-II code indicates that the evaporative vent valve in the emission control system is malfunctioning. When this occurs, the EVAP system may not be capable of pressurizing and maintaining a vacuum seal. Find out more about the most likely OBD-II scanner error code P0446 problem and related repairs. What Does the Code P0446 Mean?