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-   -   P0411 problem (https://chevroletforum.com/forum/trailblazer-27/p0411-problem-67486/)

trailblazer700 Aug 21, 2014 9:10 AM

P0411 problem
 
I have installed a new check valve, secondary air pump and relay. I was getting the codes po410 and po411 now just po410. I also repaired a broken wire on the wiring harness by splicing with electrical connectors. What else could be the issue?


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