Service bulletins for the 2013 Audi A8
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
1506 on file from NHTSA, as of 2026-10-19.
About P1B1C on the 2013 Audi A8: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: P1B1C are shown. Show all
| A011524 2040491- | 2017-10-25. Service bulletin. ENGINE AND ENGINE COOLING. The MIL is on. "Coolant System: Fault Turn Off Engine" and the coolant symbol appears in the information panel. DTC P1B1C00 is stored in the ECM. |
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| A011656 2040491- | 2017-10-04. Service bulletin. ENGINE AND ENGINE COOLING. The technical service bulletin is in regards to the MIL being on due to DTC P1B1C00 (coolant pump mechanical malfunction) being stored in the ECM. "Coolant System: Fault Turn Off Engine" and the Coolant symbol appear in the information panel. Condition can be caused by a defective thermostat or the diagnostic software is incorrectly displaying the warning. |
| A011652 2040491- | 2017-10-04. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. MIL on (DTC P1B1C); message in information panel: "Coolant System: Fault Turn Off Engine" The condition is caused either a defect with the thermostat (in model year 2012 and 2013 vehicles) or The diagnostic software is incorrectly displaying the warning. No technical issue exists. Solutions are an improved thermostat installed in production and the diagnostic software has been updated. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.