Kubota E:9206 – Engine ECU: Exhaust temperature sensor (DOC outlet) error.

This code triggers when the sensor positioned between the Diesel Oxidation Catalyst (DOC) and the Diesel Particulate Filter (DPF) sends an irregular signal to the computer. This typically means the sensor reading is out of the specified range (voltage too high/low), indicating an open circuit, a short circuit, or a completely failed sensor.

• SVL65-2
• SVL75-2
• SVL75-3
• SVL90-2
• SVL95-2s
• SVL97-2
• SSV65
• SSV75
• KX080-4
• KX040-4

1. 1

   Inspect the wiring harness from the DOC outlet sensor back to the main engine harness for melted insulation, broken wires, cracked connectors, or green corrosion.

2. 2

   Check air and fuel systems to ensure adequate fuel level, clean fuel filter, connected air-intake hoses, and a clean air cleaner element.

3. 3

   Test sensor resistance by disconnecting the sensor and using a multimeter across the terminals; an open circuit or dead short confirms a failed sensor.

1. 1

   Park and Cool Down

   Move the machine to a secure, level location. Turn off the engine and allow the exhaust/DPF system to cool completely to avoid severe burns.

2. 2

   Locate the Sensor

   Locate the DOC outlet temperature sensor. It is threaded into the exhaust piping directly between the DOC canister and the DPF canister (often referred to as the "T1" sensor position).

3. 3

   Disconnect

   Unplug the electrical connector for the sensor from the wiring harness.

4. 4

   Remove the Sensor

   Using a suitable wrench or sensor socket, carefully unthread the faulty sensor from the exhaust housing. If it is seized, penetrating oil may be required.

5. 5

   Install the New Sensor

   Thread the new OEM sensor into the exhaust housing and tighten to the manufacturer's torque specification.

6. 6

   Reconnect

   Plug the sensor back into the engine wiring harness, ensuring the connector clicks and locks securely.

7. 7

   Clear Codes and Verify

   In some cases, the code will clear itself upon startup if the circuit is restored. Otherwise, a dealer diagnostic tool (laptop) may be required to clear the stored E:9206 code.

8. 8

   Perform a Parked Regen

   Initiate a parked DPF regeneration to verify the repair. Monitor the system to ensure the DOC outlet temperatures rise normally and the regeneration cycle completes without interrupting or throwing further codes.