Case IH 3035 (DTC 22E3) - ECU – Engine Electronic Control Unit (ECU) / A-095: Engine oil temperature sensor voltage is lower than expected

The ECU detects that the voltage in the signal circuit of the oil temperature sensor (B-014) has dropped below 235 mV for a period greater than 500 milliseconds. This typically points to a short to ground in the wiring, a disconnected circuit, or an internal failure of the sensor itself.

• MAXXUM T4E
• 240 Series Axial-Flow
• 7230
• 8230
• 9230
• 5130 Axial-Flow
• Magnum series
• MX210
• MX230
• MX255
• MX285
• Puma series
• Farmall
• Maxxum models

1. 1

   Inspect the relevant wiring harnesses and connectors between the oil temperature sensor (B-014) and the ECU (A-095)

2. 2

   Check connectors for damage, bent or dislocated pins, corroded terminals, or broken wires, and verify they are fully seated

3. 3

   Flex the involved harnesses while monitoring the circuit to reveal any intermittent connection issues or shorts

4. 4

   Verify that the A-095 ECU is running the most up-to-date software version

1. 1

   Repair or replace wiring

   Repair or replace any damaged wiring or connectors found during the visual inspection.

2. 2

   Replace oil temperature sensor

   If the wiring is intact and the fault persists, the oil temperature sensor (B-014) has likely failed internally and must be replaced.

3. 3

   Install new sensor

   Install the new oil temperature sensor.

4. 4

   Connect diagnostic tool

   Connect the Case IH Electronic Service Tool (EST) to the machine's diagnostic port.

5. 5

   Clear code

   Use the EST to clear the code and verify that 3035 (DTC 22E3) has been resolved.

6. 6

   Return to service

   If the code is resolved, return the machine to service.

7. 7

   Check and re-flash ECU

   If the code has not been resolved after sensor replacement and wiring checks, check the A-095 ECU for the appropriate software and re-flash the ECU if necessary.