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Hi. I have a 2013 and have a code p0411. I took it to dealership and was told that the system is operating normally but that the port has a carbon buildup and needs to be cleaned. They quoted me $800 to do it, so I am seeing if this is something I can do and save some money. I have tried researching and have seen that using sea foam or cleaner is an option. I just am not sure where it is located or the steps required to do this. Any help?
 

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P0411 CHEVROLET Meaning
The Secondary Air Injection (AIR) System aids in the reduction of hydrocarbon exhaust emissions during a cold start-up. This occurs when the start-up engine coolant temperature (ECT) is between 5-50°C (41-122°F), and the intake air temperature (IAT) is between 5-60°C (41-140°F). The AIR pump operates 5-60 seconds after start-up.
The powertrain control module (PCM) activates the AIR system by simultaneously supplying grounds to the AIR pump and the AIR valve relays. This action closes the relays' internal contacts. The AIR pump and the AIR control solenoid valve/pressure sensor assembly are in turn energized, the pump runs and the control/shut-off valve opens.
The AIR pump sends pressurized fresh air into the pipes/hoses through the open control/shut-off valve, and into the exhaust manifold. The extra air accelerates the catalyst operation, helping it to reach operating temperature faster. The AIR pump remains ON for a short period of time after the control/shut-off valve is commanded OFF. When the AIR pump is commanded OFF it will not run or be activated until the next vehicle start. When the AIR system is inactive, the closed AIR control/shut-off valve prevents air/exhaust flow in either direction.
The AIR system pressure sensor is used to monitor pressure at the AIR control solenoid valve/pressure sensor assembly inlet during the commanded ON/OFF states.
 

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I don't think Seafoam is going to help this carbon issue because it's the secondary port system, but if you want to try it, you can find all the information you need by searching the forum. Seafoam has been covered probably 40 times.
 

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Hi. I have a 2013 and have a code p0411. I took it to dealership and was told that the system is operating normally but that the port has a carbon buildup and needs to be cleaned. They quoted me $800 to do it, so I am seeing if this is something I can do and save some money. I have tried researching and have seen that using sea foam or cleaner is an option. I just am not sure where it is located or the steps required to do this. Any help?
Did you get it cleaned? Ultimately think that is a head replacement
 

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Hi. I have a 2013 and have a code p0411. I took it to dealership and was told that the system is operating normally but that the port has a carbon buildup and needs to be cleaned. They quoted me $800 to do it, so I am seeing if this is something I can do and save some money. I have tried researching and have seen that using sea foam or cleaner is an option. I just am not sure where it is located or the steps required to do this. Any help?
How did you get this fixed? I have the same issue with my 2013 with 105K miles. Theres a lot of possibilities with this sytem.
 
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