P26FA — Coolant Pump C Overspeed/Air in System
The third coolant pump speed feedback is higher than commanded with no resistance from coolant. Indicates air in the cooling loop or low coolant level so the pump spins free.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Coolant pump c
- Cooling system
- Coolant reservoir
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Low coolant level due to leak or improper fill
- Air pocket trapped in the cooling loop
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.