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  1. Gen 7 Problems/Service Issues/Troubleshooting
    Hi everybody! Recently my family bought a 2011 chevy malibu with the engine replaced and the starts to appear the code P0411 and we found out that it didn't have any port. The computer required the pump and the catalytic converter starts to burn, what can I do to connect the pump?
  2. Gen 8 Do It Yourself Maintenance
    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...
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