The MIL is on due to DTC P042000 and/or P043000 (Catalyst system Bank 1/2, Efficiency below threshold)...
Audi technical service bulletin A011649 2041120- for 2012-2014 Audi A6, 2013-2015 Audi Q5 and 2011-2015 Audi S4 and others.
- Bulletin number
- A011649 2041120-
- Component
- Electrical system: software
- Summary
- The MIL is on due to DTC P042000 and/or P043000 (Catalyst system Bank 1/2, Efficiency below threshold) being stored in the engine control module (ECM), J623 (address word 01). The diagnostic limitations were too narrow. New ECM software implemented to correct the condition.
Owners of these vehicles have filed 72 complaints in the electrical category.
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