how to fix P0128 code in Renault Clio V (2019-Present)

Learn how to diagnose and fix P0128 cooling system issue in Renault Clio V. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative terminal of the battery to avoid electrical shorts.
• Allow the engine to cool down before starting work on the cooling system.

2. Inspect and Replace Thermostat

• Tools Required: Socket set, torque wrench, gasket scraper, coolant catch pan.
• Sub-steps:
  1. Drain the engine coolant into a catch pan.
  2. Remove the thermostat housing by unscrewing the bolts (note torque specifications for reinstallation).
  3. Carefully take out the thermostat and inspect it for proper operation (it should open and close easily).
  4. If faulty, replace it with a new thermostat that matches OEM specifications.
  5. Clean the mating surfaces of the thermostat housing and engine block with a gasket scraper.
  6. Reinstall the thermostat and housing, tightening the bolts to the specified torque.

3. Inspect and Replace Coolant Temperature Sensor

• Tools Required: OBD-II scanner, multimeter, socket set.
• Sub-steps:
  1. Locate the coolant temperature sensor on the engine (refer to service manual for exact location).
  2. Disconnect the electrical connector from the sensor.
  3. Test the sensor's resistance using a multimeter; it should match the specifications given in the service manual.
  4. If the readings are incorrect, remove the sensor using a socket, and replace it with a new one.
  5. Reconnect the electrical connector securely.

4. Refill Engine Coolant

• Tools Required: Coolant funnel.
• Sub-steps:
  1. Refill the engine with the appropriate coolant mixture (refer to the owner's manual for specifications).
  2. Run the engine with the radiator cap off to allow air to escape, topping off the coolant as necessary.
  3. Replace the radiator cap securely after all air has been purged.

5. Clear Error Codes

• Tools Required: OBD-II scanner.
• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0128 code from the vehicle’s computer.
  3. Start the engine and monitor the temperature gauge for normal operation.