2016 AUDI S8 CTJA/CWGA (4H)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Potential carbon buildup on direct injection valves
• High-pressure fuel pump wear

First checks

• Inspect carbon deposits
• Check turbocharger performance

Vor dem Teiletausch

• 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 CTJA used in select markets (Europe), CWGA variant for North America.
• Cylinder deactivation helps with fuel economy by shutting down four cylinders under light load.