Case IH 17732 (F-519694-07) - ECU – Engine Control Module (ECM) / Engine ECU: Differential pressure sensor: hoseline error

This code indicates an issue with the physical hoses (lines) connecting the Diesel Particulate Filter (DPF) to the DPF Differential Pressure Sensor. The sensor measures the exhaust pressure before and after the DPF to calculate soot accumulation. A "hoseline error" means the sensor is reading an implausible pressure differential, which typically happens if the hoses are disconnected, swapped (installed backward), leaking, or blocked by soot, debris, or condensation/ice.

• VESTRUM CVX
• Farmall 85A
• Farmall 95A
• Farmall 105A
• Farmall 115A
• Farmall 85C
• Farmall 95C
• Farmall 105C
• Farmall 115C
• Farmall 95U
• Farmall 105U
• Farmall 115U

1. 1

   Inspect the two hoses running from the DPF housing to the differential pressure sensor for disconnected lines, cracks, melting from exhaust heat, or chafing.

2. 2

   Ensure the hoses have not been swapped; the high-pressure (upstream) and low-pressure (downstream) lines must be connected to their respective ports.

3. 3

   Disconnect the hoses from both the sensor and the DPF and blow compressed air through them to check for blockages caused by heavy soot buildup or frozen condensation.

4. 4

   Inspect the 3-pin electrical connector at the DPF differential pressure sensor for corrosion, loose pins, or wiring harness damage.

1. 1

   Preparation

   Turn off the engine and allow the exhaust system and DPF to cool completely to avoid severe burns.

2. 2

   Access the Sensor

   Open the hood and remove any necessary heat shields or side panels to access the DPF and the differential pressure sensor.

3. 3

   Disconnect the Sensor

   Unplug the electrical wiring harness from the sensor.

4. 4

   Remove the Hoses

   Release the retaining clamps securing the hoses to the sensor and the DPF ports.

5. 5

   Clean or Replace Hoses

   If the hoses are brittle, cracked, or permanently clogged, replace them with new high-temperature OEM hoses. If they are just clogged with loose soot, clean them out thoroughly.

6. 6

   Replace the Sensor (If necessary)

   If the hoses are in perfect condition and properly routed, the sensor's internal diaphragm has likely failed. Unbolt the old sensor and mount the replacement.

7. 7

   Reassembly

   Reconnect the hoses, ensuring the upstream and downstream lines are on the correct ports. Secure the clamps and plug in the electrical connector.

8. 8

   Clear Codes

   Use a diagnostic tool to clear the 17732 fault code from the ECM. Run the tractor to operating temperature to ensure the code does not return. A manual/parked DPF regeneration may be required if the tractor was operated with the fault for an extended period.