2013 AUDI S4 CDNC/CTHE (8K)
8K / Sedan / Avant / Global (primarily Europe, North America, Australia, select Asian markets)
CDNCCTHEExact year/trim recordGold
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Carbon build-up on intake valves (direct injection engines)
- Supercharger belt wear
- PCV valve issues causing oil consumption
First checks
- Inspect supercharger pulley and belt condition
- Check for carbon deposits on intake valves
- Verify Haldex AWD system operation and fluid condition
Before replacing parts
- Save fault codes and freeze-frame data before clearing anything.
- Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
- Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.
Important notes
- Engine code CDNC mostly for European versions, CTHE for North American versions
- Some markets have slight power output variations depending on emission regulations