P0128
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P0128
P0128
Description
Coolant Temperature Below Thermostat Regulating Temperature
Your engine has not reached its operating temperature in the correct time.
Symptoms
You will likely not notice any drivability problems other than the SES light.
Causes
Description
Coolant Temperature Below Thermostat Regulating Temperature
Your engine has not reached its operating temperature in the correct time.
You will likely not notice any drivability problems other than the SES light.
Causes
- Low engine coolant level
- Leaking or stuck open thermostat
- Cooling fan (running too much)On all the time
- Defective coolant temperature (ECT) sensor
- Defective intake air temperature (IAT) sensor
- Replace thermostat
- Check coolant level
- Check for proper cooling fan operation (Is fan running to much)
- Replace ECT
- Check and replace (IAT) sensor if necessary.
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