# P1B1C on the 2014 Audi A5

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.

This code is specific to a manufacturer and is not described here.

## Bulletins for this model year that name P1B1C

- [10120743](https://open.wenmarpro.com/bulletins/10120743), 2017-10-25: 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.
- [10118392](https://open.wenmarpro.com/bulletins/10118392), 2017-10-04: 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.
- [10118301](https://open.wenmarpro.com/bulletins/10118301), 2017-10-04: 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.