Diyvehiclerepair
- Which end of a thermostat goes into the block?
- What does error code P0128 mean?
- How is P0128 diagnosed?
- Where is the thermostat located?
- How do I know if my thermostat or water pump is bad?
Which end of a thermostat goes into the block?
The shorter end of the thermostat always points away from the engine. The deep end of the thermostat is always put into the engine.
What does error code P0128 mean?
Code P0128 stands for Engine Coolant Temperature Below Thermostat Regulating Temperature. It means that the ECM/PCM has “noticed” that the engine coolant temperature is consistently running below thermostat regulating temperature. In other words, the engine is running cooler than it should.
How is P0128 diagnosed?
The most common cause for P0128 is the engine coolant thermostat is stuck open. A simple way to diagnose this is to feel the radiator hose and monitor how hot the temperature of the coolant is when it starts flowing through the radiator hose.
Where is the thermostat located?
Most thermostats are located where the top radiator hose joins the engine, so these steps deal with this type. If your thermostat is in the bottom radiator hose, the principle is the same.
How do I know if my thermostat or water pump is bad?
Answer: If the temperature gauge indicates the engine is overheating, the water pump bearing may be faulty and not allowing coolant to circulate properly. Another possibility is the thermostat is not functioning right. Depending on your particular model, you can try to listen to the pump with a length of hose.
