Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P1B1C00coolant pump mechanical malfunction
Manufacturer communications
3Original wording in English
AUDI
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 incorre…
AUDI
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 i…
AUDI
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.
Check vehicle applicability
69A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Audi | A3 ↗ | 2013 |
| Audi | A3 ↗ | 2012 |
| Audi | A3 CABRIOLET ↗ | 2015 |
| Audi | A4 ALLROAD ↗ | 2015 |
| Audi | A4 ALLROAD ↗ | 2014 |
| Audi | A4 ALLROAD ↗ | 2013 |
| Audi | A4 AVANT ↗ | 2012 |
| Audi | A5 ↗ | 2015 |
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.