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Discussion Starter · #1 ·
So as the title states, unfortunately I got both of those codes on my 2009 xB and one of them is for Brake Boost Sensor Circuit Range/Performance and the other is for Engine control system communication circuit malfunction. I do my own work on my cars for the most part but frankly I haven’t been able to figure out whats causing the problems; I’m sure it might be sensors but I’m just not sure which ones. If you guys could possibly give me a few pointers on what you did I would highly appreciate it, thank you guys!
 
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