Faults P194A Coolant Pump RPM too High or P16C Heater Support Pump Dry Running – Main Forum – AUTO REPAIR SOURCE Forum
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Faults P194A Coolant Pump RPM too High or P16C Heater Support Pump Dry Running


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Faults present in Engine/Motor Control Module -J623- after adding coolant or refilling the cooling system.
If either fault P16C600 (Heater Support Pump Dry Running) or P194A0 (Coolant Pump RPM Too High) are present in
Engine/Motor Control Module -
J623-, after adding coolant for a low coolant concern or draining and refilling the
cooling system, there may be air trapped Heater Support Pump -
V488-.

The air may be difficult to remove from Heater Support Pump -V488-. The cooling system must be drained or refilled
using the -VAS6096- Cooling System Charge Kit called out in ElsaPro under repair manual group 19 Cooling System,
Cooling System/Coolant, Coolant Draining and Filling.
If either fault P16C600 (Heater Support Pump Dry Running) or P194A00 (Coolant pump RPM too high, are present in
Engine/Motor Control Module -
J623- after refilling the cooling system with -VAS6096 - Cooling System Charge Kit:
* Raise the front of the vehicle higher than the rear of the vehicle in a safe manner to aid in removal of the air
from the cooling system.
With the front of the vehicle raised:
* Run the drain and refill procedure at least one time to remove the air from the cooling system and retest
operation.