P2181 on the 2013 Audi S8
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| 148820380451 | 2022-08-01. Service bulletin. DTC P218100 will be stored if, after a specified air flow (warm-up phase), the measured engine temperature does not reach the value in the timing map. Particles in the cooling system from the production process affect the closing of the coolant thermostat. |
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| A011522 2038045- | 2017-10-21. Service bulletin. Supersedes Technical Service Bulletin Group 01 number 14-88 dated August 15, 2014. The MIL is on. DTC P218100 (Cooling System Performance) is stored in the engine control module (ECM), J623 (address word 01). DTC P218100 will be stored if, after a specified air flow (warm-up phase), the measured engine temperature does not reach the value in the timing map. Particles in the cooling system from the production process affect the closing of the coolant thermostat. Replacing the coolant temperature sender does not fix the problem. |
2 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.