Case IH 3756 – ENGINE: Level 2 Monitoring: Diagnosis fault check to report the demand for normal mode due to an error in the PoI2 quantity

Indicates an issue with the Post Injection 2 (PoI2) fuel quantity. The system's Level 2 monitoring has detected an error in the plausibility of this injection quantity, forcing the system to demand 'normal mode'. This is classified as an ECU Internal fault, meaning the root cause is an internal failure within the module or a software calibration error.

• Farmall
• Steiger T4B
• Skid Steer Loaders (SSL)
• Compact Track Loaders (CTL)
• Tractors
• FPT Tier 3 and Tier 4a engines
• F5C engines
• F5H engines

1. 1

   Connect the Case IH Electronic Service Tool (EST) to the machine

2. 2

   Verify if the fault code is currently active or stored

3. 3

   Attempt a standard code clearing and reset to see if the fault persists, as the issue stems from an internal ECM failure or dataset corruption

1. 1

   Reload the Engine Dataset

   Using the Electronic Service Tool (EST), reflash or reload the engine dataset to correct potential calibration errors.

2. 2

   Evaluate

   Run the machine to see if fault code 3756 returns.

3. 3

   Replace the Module

   If the fault persists after the dataset reload, the internal failure is unrecoverable, and you must replace the Engine Controller (EDC).

4. 4

   Restore Parameters

   If the EDC is replaced, you must follow the appropriate service tool procedure to restore the engine's 'Self Learning Parameters'.