How to Replace Coolant Temperature Sender/Switch 88-00 Honda Civic
Difficulty: Intermediate · About 60 min · Honda Civic
Replace the coolant temperature sender on a 1988–2000 Honda Civic by draining coolant, changing the sensor and hose connection, then refilling and checking the cooling system.
Tools you will need
- 24mm socket and ratchet
- Drain pan
- Needle nose pliers
- Funnel
- Coolant
Parts and supplies
- Coolant temperature sensor
Steps
- Drain coolant after cooling
Let the engine cool completely and place a drain pan beneath the radiator. Open the drain carefully, then remove the radiator cap only when cold and allow coolant to drain before closing the plug.
- Remove the temperature sensor
Loosen the radiator hose clamp and move the hose aside. Disconnect the sensor wiring, then remove the sensor with a 24mm socket while catching any remaining coolant.
- Install the replacement sensor
Install the correct sensor and tighten it to the vehicle's specification. Reconnect its harness, refit the radiator hose, and reposition the clamp securely.
- Refill and bleed the cooling system
Close the drain and refill with the specified coolant using a funnel. Follow the vehicle's bleed procedure with the heater set as directed, monitor temperature, check for leaks, and verify the coolant level again after cooling.
Check your vehicle’s repair manual for exact specifications and fit.