P0128 Fault-error code COOLANT THERMOSTAT FAILURE

What is P0128 fault-error code?

P0128 Fault-error code is an error code identified by the OBD-II (On-Board Diagnostics II) system and is related to the cooling system of the vehicle's engine. Below is more information about the P0128 error code:

Meaning of P0128 Fault/error code:

P0128 Malfunction/error code indicates that the engine's cooling system thermostat is operating below the expected temperature range.

Causes of P0128 Fault/error code

Causes of the P0128 Fault/error code code may be:

1. Faulty thermostat.

2. A problem that delays the thermostat's opening temperature.

3. ECT (Engine Temperature Sensor) malfunction.

4. Coolant missing or low level.

Symptoms of P0128 Malfunction/error code

Symptoms of the P0128 Fault/error code may include:

1. "Check Engine" or "Service Engine Soon" light comes on.

2. The engine remains cold for longer than normal.

3. Decrease in fuel efficiency.

4. The engine does not reach normal temperature.

P0128 Fault/error code How to Determine:

• The P0128 fault/error code can be read by the on-board computer system using an OBD-II scanner or code reader.

• The scanner or reader reads the error code by connecting to the vehicle's OBD-II port.

P0128 Fault/error code Errors Made While Correcting:

• Errors made while correcting the P0128 fault/error code may include:

  1. Just resetting the error code and not fixing the cause of the problem.

  2. Delaying or not doing it when the thermostat needs to be replaced.

Severity of P0128 Fault/error code:

• The P0128 error may prevent the engine from reaching normal operating temperature. This may affect fuel efficiency and shorten the normal operating life of the engine.

Solution to P0128 Fault/error code:

• You can follow the steps below to solve the P0128 fault/error code:

  1. Replacing the thermostat.

  2. If there is a problem that delays the opening temperature of the thermostat, it should be repaired or the thermostat should be replaced completely.

  3. If the ECT (Engine Temperature Sensor) is faulty, replace the sensor.

  4. If the coolant is missing or at a low level, adjust the level correctly or add the missing fluid.

Things to Consider for P0128 Fault/error code:

• The P0128 Fault/error code is related to the engine's cooling system and it is important not to delay this problem. Otherwise, the engine may be delayed in reaching its normal operating temperature and the engine may be damaged. It is recommended that you contact an automobile mechanic to solve the problem.