The MIL is on. DTCs are stored in the ECM. Under extreme driving conditions (such as short-distance,...
Audi technical service bulletin A011473 2031458- for 2009-2012 Audi A6, 2011-2012 Audi Q7 and 2010-2012 Audi S4 and others.
- Bulletin number
- A011473 2031458-
- Component
- Engine and engine cooling
- Summary
- Supersedes Technical Service Bulletin Group 01 number 13-45 dated December 5, 2013. The MIL is on. DTCs are stored in the ECM. Under extreme driving conditions (such as short-distance, stop-and-go driving), high crankcase pressure can cause the DTCs to appear. The condition can be improved and the DTCs eliminated when the crankcase pressure valve is changed to a lower operating pressure and the ECM software is updated to compensate for new crankcase pressure.
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