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So my 2009 S60 2.5T wouldn't pass emissions because of a stored P0027 code. This code refers to a problem with the VVT solenoid, which I replaced. I cleared the code and then it came back a day later. Now there are 3 codes, the P0027, a P0101 code (Mass air flow related), and P0442 for an emissions leak. Is it likely that all these are related, or is there an issue with the ECU that is throwing all of these codes? (158k miles)
 
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