Kubota E:018 – Meter Panel / LCD Display Panel: Water Temperature Sensor Error

The sensor is sending an erratic, out-of-range, or missing signal (often due to an open or short circuit). Because the system cannot read a valid temperature, the ECU/display disables the coolant temperature gauge, and the gauge will disappear from the LCD display to prevent the operator from relying on false data.

• KX018-4
• KX015-4
• KX016-4
• KX080-3
• KX080-4
• KX057-4
• U-17
• U15-3
• U25-3
• U35-3
• U35-4
• U45-3
• U50-5S
• K008-3

1. 1

   Verify that the warning lamp on the LCD panel is blinking red and displaying 'E:018'

2. 2

   Enter the meter panel's 'Tester Mode' (Service Dealer Mode) to view the live voltage/resistance data coming from the coolant temperature sensor. A reading of 0.00V or infinite resistance indicates a complete loss of signal

3. 3

   Inspect the wiring harness and dual-pin connector between the coolant temperature sensor (on the engine block/thermostat housing) and the meter panel for chafed wires, broken pins, or corrosion

4. 4

   Disconnect the sensor and test it with a multimeter. If the resistance does not change when the engine warms up, or if it shows an open circuit, the sensor has failed internally

1. 1

   Preparation

   Ensure the machine is turned off, the key is removed, and the engine is completely cool. Never open the cooling system when the engine is hot.

2. 2

   Locate the Sensor

   Locate the water temperature sensor on the engine. It is typically threaded into the cylinder head or near the thermostat housing (it features a brass hex-head body with a sealed electrical connector).

3. 3

   Disconnect

   Unplug the electrical connector from the sensor.

4. 4

   Removal

   Place a catch pan under the engine to catch any minor coolant spillage. Use a wrench to unscrew the faulty sensor from the engine block.

5. 5

   Installation

   Apply a small amount of thread sealant (Teflon tape or liquid thread sealant) to the threads of the new sensor if it does not come pre-applied. Thread the new sensor in by hand to prevent cross-threading, then tighten it securely with a wrench.

6. 6

   Reconnect

   Plug the electrical connector back into the new sensor.

7. 7

   Refill Coolant

   Check the radiator and coolant recovery tank. Top off any coolant that was lost during the swap.

8. 8

   Clear Code & Test

   Turn the ignition key to the ON position. The E:018 code should clear automatically, and the coolant temperature gauge should reappear on the LCD display. Start the engine and check for leaks around the new sensor.