Case IH 19413 – Engine Control Module (ECM / Engine ECU): Crankcase pressure sensor 2 (in blow by hose) voltage is higher than expected

The engine control system has detected that the electrical voltage signal returning from the crankcase pressure sensor is exceeding the maximum threshold of its normal operating range. This is typically an electrical circuit issue, pointing to a short to power (voltage) on the signal wire, an open ground/return circuit, or an internal short within the sensor itself.

• Tier 4b
• Case N-Series Tractor Loader Backhoes (Tier 4 Final)
• Case IH Combines: 5140, 6140, 6150, 7140, 7150, 7240, 7250, 8240, 8250, 9240, 9250
• Case CE Wheel Loaders: 1021G, 1121F, 1121G

1. 1

   Inspect the wiring harness and the electrical connector at the crankcase pressure sensor for chafing, melted wires, corrosion, or bent pins.

2. 2

   Verify that the sensor is receiving the correct 5V reference voltage and has a solid ground connection using a multimeter.

3. 3

   Unplug the sensor and use a diagnostic scan tool to monitor the sensor voltage data PID. If the voltage drops to 0V when unplugged, the sensor is internally shorted. If the voltage remains high, there is a short to power in the engine wiring harness.

4. 4

   Check the blow-by hose for severe blockages, ice accumulation (in cold weather), or physical damage that could be impacting the sensor's environment.

1. 1

   Park the machine on a level surface, turn off the engine, remove the key, and disconnect the battery to prevent electrical shorts during repair.

   Park the machine on a level surface, turn off the engine, remove the key, and disconnect the battery to prevent electrical shorts during repair.

2. 2

   Locate Crankcase Pressure Sensor 2, which is mounted directly in the engine's blow-by hose assembly.

   Locate Crankcase Pressure Sensor 2, which is mounted directly in the engine's blow-by hose assembly.

3. 3

   Depress the locking tab on the electrical connector and carefully unplug it from the sensor.

   Depress the locking tab on the electrical connector and carefully unplug it from the sensor.

4. 4

   If the diagnostic checks pointed to a harness issue, repair the shorted wire or open ground in the harness. If the sensor is faulty, remove the sensor from the blow-by hose.

   If the diagnostic checks pointed to a harness issue, repair the shorted wire or open ground in the harness. If the sensor is faulty, remove the sensor from the blow-by hose.

5. 5

   Install the new crankcase pressure sensor into the blow-by hose.

   Install the new crankcase pressure sensor into the blow-by hose.

6. 6

   Reconnect the electrical connector, ensuring the locking tab clicks securely into place.

   Reconnect the electrical connector, ensuring the locking tab clicks securely into place.

7. 7

   Reconnect the battery.

   Reconnect the battery.

8. 8

   Connect a diagnostic scan tool to the machine's diagnostic port, clear the 19413 fault code, and start the engine.

   Connect a diagnostic scan tool to the machine's diagnostic port, clear the 19413 fault code, and start the engine.

9. 9

   Monitor the live data for the crankcase pressure sensor to verify the voltage is now reading within the expected normal range and ensure the code does not return.

   Monitor the live data for the crankcase pressure sensor to verify the voltage is now reading within the expected normal range and ensure the code does not return.