Coolant Thermostat Below Regulating Temperature
2021-2024 Dacia Spring Electric 🇩🇪
Description
The engine coolant has not reached the expected temperature within a specified time after startup.
Symptoms
- Check Engine Light
- Poor fuel economy
- Heater not getting hot
- Engine running cool
Common Causes
- Stuck-open thermostat
- Missing thermostat
- Faulty ECT sensor
- Cooling fan stuck on
Diagnostic Steps
- Monitor ECT warmup curve
- Check thermostat
- Verify fan operation
- Test ECT sensor
Repair Notes
Replace thermostat.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0128 on Other Vehicles
Dacia Bigster
2025-2025 1.2L I3 Turbo TCe 130
Dacia Bigster
2025-2025 1.6L I4 Hybrid 155
Dacia Duster
2017-2024 1.0L I3 TCe
Dacia Duster
2017-2024 1.3L I4 TCe
Dacia Duster
2017-2024 1.5L I4 dCi
Dacia Duster
2024-2025 1.0L I3 TCe 100 LPG
Dacia Duster
2024-2025 1.2L I3 Hybrid TCe 130
Dacia Duster PL
2018-2025 1.0L I3 Turbo TCe 100
Common Questions
What does code P0128 mean on a 2021-2024 Dacia Spring?
P0128 stands for "Coolant Thermostat Below Regulating Temperature". The engine coolant has not reached the expected temperature within a specified time after startup.
What are the symptoms of P0128 on a Dacia Spring?
Common symptoms of P0128 include: Check Engine Light, Poor fuel economy, Heater not getting hot, Engine running cool.
What causes P0128 on a 2021-2024 Dacia Spring?
Common causes of P0128 include: Stuck-open thermostat, Missing thermostat, Faulty ECT sensor, Cooling fan stuck on.