Your lambda sensor heating is not working, secondary air injection might not be working but the more important issue and first to address is MAF. Could be that MAF is just dirty or bad connection in wiring/connectors but more likely that you will need new MAF. You really want it sorted because if MAF readings are wrong then reported engine load values will be incorrect and can cause damage to gearbox in long term which equals big bill.
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
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