Engine thermostat malfunction, temp below normal range.
Basically the engine is not warming up fast enough.
P0128 is thermostat malfunction. The thermostat needs replaced.
Engine not reaching operating temperature.
P0128 says the engine isn't warming up to proper specs. Start with replacing the thermostat.
It means the engine didn't warm up to the correct operating temperature. Thermostat is probably stuck open. Replace the thermostat.
The engine is not reaching normal operating temperature. Replace the thermostat.
it is low coolant temperature, could be the thermostat could be the sensor for coolant temperature.
Yes, a P0495 error code, which indicates a problem with the secondary air injection system, can contribute to a P0128 error code, which signals that the engine is not reaching the proper operating temperature. If the secondary air system is malfunctioning, it can affect engine performance and efficiency, potentially leading to insufficient heat generation. This could result in the engine taking longer to warm up, triggering the P0128 code. It's advisable to address both codes to ensure optimal engine function.
Engine coolant Sensor is bad. I have the same error on my 2005.
The OBD2 code P0128 for a Saturn SC1 indicates a problem with the engine coolant temperature being below the thermostat regulating temperature. This could be caused by a faulty thermostat, low coolant level, or a malfunctioning coolant temperature sensor. It is important to diagnose and address the issue to prevent damage to the engine.
Trouble code P0128 means: ECT Sensor Below Thermostat Regulating Temperature
Trouble code P0128 means: ECT Sensor Below Thermostat Regulating Temperature
Trouble code P0128 means:Coolant thermostat (coolant temp below thermostat regulating temp)