Kubota P242C – Engine ECU: Exhaust gas temperature sensor 2 (T2) abnormality (Low side)

The control module detects that the voltage signal from the DPF (Diesel Particulate Filter) outlet temperature sensor (T2) has dropped to 0.08 V or less for 5 seconds or more. This indicates a short to ground in the sensor itself, a short to ground in the wiring harness, or a complete internal failure of the sensor.

• V2403-CR-TE4B
• V2403-CR-TE5B
• V3307
• V3800
• SVL65-2
• SVL75-2
• SVL90-2
• SVL95-2S
• SVL97-2
• Baroness mowers

1. 1

   Verify the machine's overall battery voltage is normal, as low system voltage can cause erratic sensor readings.

2. 2

   Connect a diagnostic scan tool and view live data for the exhaust temperature sensors to confirm T2 voltage is stuck at or below 0.08 V or frozen at a default minimum value.

3. 3

   Turn the key switch OFF and visually inspect the T2 sensor, connector, and wiring harness routing for melted wires, chafing, moisture intrusion, or corrosion.

4. 4

   Disconnect the T2 sensor and use a multimeter to check the harness side for a short to ground. If the harness tests good, the sensor has failed internally.

1. 1

   Power Down

   Ensure the machine is turned off and the key is removed. Allow the exhaust system to cool completely to avoid severe burns.

2. 2

   Harness Repair

   If the diagnostic circuit test revealed a short to ground in the wiring, repair the damaged section of the harness or replace the connector terminal.

3. 3

   Sensor Replacement

   If the wiring is intact, disconnect the faulty T2 Exhaust Gas Temperature Sensor from the wiring harness.

4. 4

   Unthread Sensor

   Carefully unthread the sensor from the DPF exhaust piping.

5. 5

   Install New Sensor

   Install the new EGT sensor. (Note: If the new sensor does not have anti-seize pre-applied to the threads, apply a small amount of high-temp sensor-safe anti-seize, being extremely careful not to get any on the sensor probe itself). Tighten to OEM specifications.

6. 6

   Reconnect Sensor

   Reconnect the sensor to the engine wiring harness.

7. 7

   Verification

   Reconnect your diagnostic scan tool, clear the P242C fault code, and start the engine. Monitor the live data to ensure the T2 sensor is now reading a plausible temperature that rises as the exhaust heats up. You may need to perform a forced DPF regeneration to verify the system is fully operational and the engine derate is lifted.