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Guys,
I have code P0128 Colant Temperature below Thermostat. Coolant Temperature gauge is not maintaining optimal value (~195 degrees). Meaning, it's never at halfway mark on the cluster. Sometimes while driving, it will go really low.

The car has heater. No issues there.

I have replaced BOTH thermostat (Part #330424) and coolant temperature sensor (Part 180137).

Code won't go away and cluster temp reading is still low. Coolant level is also good.

What am I missing?
 

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Could be the variator of the coolant pump, so it always pumps the maximum amount of coolant. The ghibli has the main coolant pump which is driven by the serpentine belt and a electrical secondary pump. Mybe one of them has an issue.
 

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Do you happen to have pictures of the location of part# 180137? I'm going to be replacing this part over the weekend, have the windscreen off and I can't seem to find it? Help would be appreciated
Guys, I have code P0128 Colant Temperature below Thermostat. Coolant Temperature gauge is not maintaining optimal value (~195 degrees). Meaning, it's never at halfway mark on the cluster. Sometimes while driving, it will go really low. The car has heater. No issues there. I have replaced BOTH thermostat (Part #330424) and coolant temperature sensor (Part 180137). Code won't go away and cluster temp reading is still low. Coolant level is also good. What am I missing?
 
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