how to fix P0128 code in Tesla Outback 6th Generation (2020-2024)?

Learn how to diagnose and fix P0128 cooling system issue in Tesla Outback 2020-2024. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical issues.

2. Replace Thermostat

• Tools Required: Socket set, torque wrench, screwdriver, coolant catch pan.
• Sub-steps:
  1. Locate the thermostat housing, typically situated near the engine block.
  2. Remove any components obstructing access to the thermostat, such as air intake ducts.
  3. Drain the coolant into a catch pan by removing the drain plug or by disconnecting the lower radiator hose.
  4. Unbolt the thermostat housing using a socket wrench.
  5. Remove the old thermostat and clean the mating surfaces of the housing and engine block.
  6. Install the new thermostat in the correct orientation (check for the alignment mark).
  7. Reattach the thermostat housing and torque the bolts to manufacturer specifications (typically around 9-12 ft-lbs).
  8. Reconnect any components that were removed for access.

3. Replace Coolant Temperature Sensor (if necessary)

• Tools Required: Socket set, torque wrench.
• Sub-steps:
  1. Locate the coolant temperature sensor, usually near the thermostat housing.
  2. Disconnect the electrical connector from the sensor.
  3. Remove the sensor using a socket wrench, being careful not to damage surrounding components.
  4. Install the new sensor and torque it to manufacturer specifications.
  5. Reconnect the electrical connector.

4. Refill Coolant

• Sub-steps:
  1. Refill the coolant reservoir with the appropriate type of coolant (check manufacturer specifications).
  2. Start the engine and allow it to reach operating temperature while monitoring the coolant level.
  3. Top off the coolant as necessary and check for leaks.